Hope Beyond Fear:
Karl Barth, Jürgen Moltmann, and the Possibility of Christian–Muslim Friendship in a Divided World
Timothy P. Cotton
| hope_beyond_fear.pdf |
1. Introduction: A Timely Moment for Christian Witness
Recent encouragement from the Pope that Christians and Muslims should seek friendship and cooperation has generated renewed theological discussion about how Christians understand their relationship to people of other faiths. In a political environment shaped by suspicion, nationalism, and cultural anxiety, the suggestion that Christians might openly affirm friendship with Muslims can appear controversial. Some fear that such openness weakens Christian conviction. Others worry that dialogue implies that all religions are the same. Yet historic Christian theology does not support either conclusion.
The question facing the church today is not whether Christianity and Islam are identical. They clearly are not. The question is whether Christian faith, rightly understood, requires fear of religious difference. The theology of Karl Barth and Jürgen Moltmann provides strong reasons to conclude that it does not.
Barth’s theology centers on the conviction that God has decisively revealed himself in Jesus Christ. Because revelation is God’s work rather than a human achievement, Christians are freed from the anxiety that often accompanies religious competition. Truth does not depend upon human defense. God does not require hostility in order to remain God. Barth famously argued that human religion, including Christianity as a human system, cannot secure divine truth by its own power. In his discussion of revelation, Barth writes:
“We begin by stating that religion is unbelief.”¹
Barth’s claim is intentionally provocative. He does not deny the importance of faith communities, but he insists that human religious systems cannot control God. Revelation comes from God’s freedom, not from human possession. This means that Christians cannot treat faith as ideological property to be defended against outsiders. The truth of the gospel rests in God’s faithfulness, not in human efforts to preserve it.
Because God is free, Christians are also free. Faith in Christ removes the need to secure identity through opposition to others. Christian witness does not depend upon fear.
Jürgen Moltmann develops this insight through his theology of hope. Writing in the aftermath of the devastation of World War II, Moltmann emphasized that Christian faith looks forward to the future God has promised rather than clinging anxiously to present structures of security. Hope, for Moltmann, is not wishful thinking but confidence grounded in the resurrection of Christ. Moltmann writes:
“From first to last… Christianity is eschatology, is hope.”²
Christian faith is therefore oriented toward the future reconciliation of all things. Because the future belongs to God, Christians need not respond defensively to religious difference. Hope opens space for encounter. Hope allows Christians to meet others without anxiety because the fulfillment of history does not depend upon human control.
For Moltmann, the resurrection of Christ reveals that the future is not determined by violence, exclusion, or domination. Instead, the future is shaped by the promise of new creation. Christian hope anticipates the transformation of the world, not its division into permanently hostile camps.
Both Barth and Moltmann wrote in contexts where Christianity was frequently entangled with political power. Barth resisted the ideological nationalism of Nazi Germany, insisting that allegiance to Christ must take precedence over allegiance to nation or culture. His involvement in the Barmen Declaration of 1934 reflects this conviction:
“Jesus Christ… is the one Word of God whom we have to hear and whom we have to trust and obey in life and in death.”³
Christ alone is Lord. No political ideology, national identity, or religious institution can claim ultimate authority.
Moltmann likewise warned that Christianity loses its integrity when it becomes a tool of political identity or cultural dominance. The crucified Christ reveals a God who suffers with humanity rather than ruling through coercion. The risen Christ reveals a future grounded in reconciliation rather than exclusion.
Taken together, the theology of Barth and Moltmann suggests that Christian faith does not require hostility toward people of other religions. On the contrary, confidence in Christ creates freedom to encounter others without fear.
Friendship between Christians and Muslims, therefore, need not be understood as theological compromise. It may instead be understood as an expression of trust in the God whose future includes the reconciliation of all things.
Faith in Christ does not produce fear of neighbors.
It produces freedom to love them.
2. Karl Barth: Revelation and the Humility of Christian Witness
Karl Barth’s theology provides one of the strongest foundations in modern Christian thought for approaching people of other religions without fear. Writing in the turbulent political climate of early twentieth-century Europe, Barth resisted attempts to identify Christianity with cultural identity, national ideology, or civilizational superiority. For Barth, Christian faith begins not with human religion but with God’s self-revelation in Jesus Christ.
Because revelation comes from God rather than from human discovery, Christians cannot treat truth as something they possess or control. Revelation confronts human systems of religion rather than affirming them as secure containers of divine truth. Barth therefore offers one of the most striking critiques of religious certainty found in modern theology:
“We begin by stating that religion is unbelief.”⁴
This statement has often been misunderstood. Barth does not deny the importance of faith communities, nor does he suggest that belief itself is false. Rather, Barth argues that whenever human beings attempt to secure God through religious systems, they inevitably distort the freedom of divine grace. Religion becomes unbelief when it assumes that God can be captured within human institutions, doctrines, or cultural identities.
Barth’s concern is especially relevant in times when Christianity becomes closely aligned with political or national identity. When faith is used to define civilizational boundaries, religious commitment easily becomes a tool of exclusion rather than a witness to Christ. Barth insists that God’s revelation judges all human attempts to turn faith into ideology.
In this sense, revelation does not reinforce religious self-confidence; it disrupts it. God’s self-disclosure in Christ overturns every human attempt to claim mastery over divine truth. Barth therefore describes revelation as the decisive interruption of religion’s tendency to absolutize itself:
"Religion is the attempt of man to anticipate what God...wills and does"”⁵
This does not mean the abolition of faith, but the abolition of the illusion that religious systems possess God. Even Christianity as a human institution must continually be corrected and re-formed by the living Word of God.
Such a theological posture produces humility. If revelation comes from God’s freedom, then Christians cannot assume that their understanding of God is complete or final. Theology becomes an act of listening rather than an assertion of control.
Barth’s emphasis on humility does not weaken Christian conviction. On the contrary, it strengthens confidence in Christ by removing the burden of defending God through human effort. The truth of the gospel rests in God’s faithfulness, not in human argument or coercion.
This insight has significant implications for how Christians relate to people of other religions. If God is free, then Christians need not respond to religious difference with anxiety. Dialogue does not threaten Christ because Christ does not depend upon human protection.
Barth’s participation in the drafting of the Barmen Declaration illustrates this principle in a political context. In opposition to attempts by the German Christian movement to align the church with nationalist ideology, the declaration affirms:
“Jesus Christ… is the one Word of God whom we have to hear and whom we have to trust and obey in life and in death.”⁶
Christ alone is Lord. No nation, ideology, or religious identity can claim ultimate authority.
Because allegiance belongs to Christ alone, Christians are liberated from the need to secure identity through opposition to others. Faith does not require enemies in order to remain strong. The lordship of Christ frees the church from fear.
Barth further emphasizes that reconciliation originates in God’s action rather than human initiative. In Christ, God has already moved toward humanity in grace:
“In Jesus Christ God has reconciled the world to Himself.”⁷
Revelation is therefore an act of reconciliation rather than exclusion. God’s self-disclosure in Christ is directed toward the restoration of humanity, not the creation of new divisions.
This does not mean that Barth believed all religions are equally true. Barth clearly affirms the uniqueness of Christ as the decisive revelation of God. Yet precisely because Christ is the center of faith, Christians do not need to defend truth through hostility toward others.
Confidence in Christ produces freedom. Christian witness becomes invitation rather than threat.
The church speaks truthfully about its convictions while recognizing that God’s grace cannot be confined within human boundaries. Because revelation is God’s work, Christians may encounter people of other faiths with openness rather than fear.
Barth’s theology therefore provides a crucial foundation for understanding why friendship between Christians and Muslims does not require theological compromise. Christian faith does not depend upon the rejection of neighbors. It depends upon trust in Christ.
Faith that is secure in Christ does not fear dialogue.
It welcomes it.
3. Jürgen Moltmann: Hope, the Future of God, and Openness to the Other
If Karl Barth’s theology frees Christians from the illusion that religion can possess God, Jürgen Moltmann’s theology of hope frees Christians from fear about the future. Writing as a German prisoner of war who had witnessed the catastrophic consequences of ideological nationalism, Moltmann sought to articulate a vision of Christian faith capable of resisting despair, violence, and exclusion. His central insight is that Christian faith is not primarily concerned with preserving the past but with anticipating the future God has promised.
For Moltmann, Christian theology begins with the resurrection of Christ, which reveals that history is not closed but open. The future does not belong to the powers of domination, nor is it determined by present conflicts between cultures or religions. The future belongs to God’s promise of new creation.
Moltmann therefore describes Christianity in unmistakably forward-looking terms:
“From first to last… Christianity is eschatology, is hope.”⁸
Christian faith lives from the expectation that God is drawing history toward reconciliation. Hope is not an escape from the world but engagement with the world in light of God’s promised future. Because the future belongs to God, Christians need not respond to difference with anxiety or hostility.
Hope produces openness.
Fear produces defensiveness.
Moltmann insists that Christian hope transforms the way believers live in the present. Rather than seeking security through exclusion, Christians are called to live as signs of the coming kingdom. The church anticipates the future of reconciliation by embodying reconciliation now. He writes:
“The eschatological outlook… involves the contradiction of the present.”⁹
Hope challenges structures of domination, including those that attempt to divide humanity into permanently opposed religious or cultural camps. The future promised in Christ is not a future of endless conflict but of renewal.
Moltmann’s theology emerged from the recognition that Christian faith had too often been aligned with political power. The catastrophes of the twentieth century demonstrated the danger of identifying Christianity with national destiny or cultural superiority. Moltmann therefore emphasized that the cross of Christ stands in judgment over every attempt to use religion as an instrument of domination.
In The Crucified God, Moltmann argues that God is revealed not in triumphalist power but in suffering love. The crucifixion discloses a God who enters into human suffering rather than remaining distant from it. This vision of God undermines religious hostility by revealing divine solidarity with all who suffer.
Moltmann writes:
“The cross of Christ… reveals God’s solidarity with the godless and the godforsaken.”¹⁰
Because God has entered into the depths of human suffering, Christians cannot restrict compassion to members of their own religious community. The crucified Christ reveals a God whose love extends beyond human boundaries.
Hope, therefore, is not merely a theological concept. It is a way of living that reflects trust in God’s future. Christians do not create the kingdom of God through political power, but they bear witness to its coming through lives shaped by reconciliation.
Moltmann consistently emphasizes that Christian hope is communal rather than individualistic. The future promised in Christ is not the salvation of isolated individuals but the renewal of creation itself. God’s redemptive purpose encompasses humanity as a whole.
Because the kingdom of God is universal in scope, Christian faith cannot be reduced to a cultural identity marker. Nor can it justify hostility toward those who belong to different religious traditions.
Hope widens the horizon of Christian concern.
Moltmann writes:
“Hope’s statements of promise… must contradict the present.”¹¹
The present reality of division between religions does not determine the final future of humanity. Christians live in anticipation of a future in which reconciliation overcomes hostility.
This does not mean that Moltmann collapses distinctions between religions. Like Barth, Moltmann affirms the decisive significance of Christ. Yet the universality of God’s redemptive purpose prevents Christians from assuming that religious difference must necessarily lead to conflict.
Christian hope allows believers to encounter Muslims, Jews, and people of other traditions without fear that dialogue threatens the gospel. The truth of Christ does not depend upon isolation from others.
On the contrary, hope calls Christians outward.
Hope calls Christians toward engagement.
Hope calls Christians toward peace.
Because the future belongs to God, Christians are liberated from the need to defend faith through hostility.
Confidence in God’s promise creates freedom to encounter others with humility and courage.
Hope does not weaken Christian conviction.
Hope makes Christian love possible.
4. Fear as a Theological Problem
Fear often presents itself as a necessary defense of faith. In periods of social change or geopolitical tension, religious communities frequently interpret difference as danger. Islam, in particular, is often portrayed in Western discourse not simply as a theological alternative but as a civilizational threat. Such fear is rarely limited to theological disagreement. It often becomes entangled with cultural identity, political rhetoric, and historical memory.
Karl Barth and Jürgen Moltmann both recognized that fear can distort Christian theology when it becomes a primary lens through which believers interpret the world. Fear encourages defensiveness. Defensiveness easily becomes hostility. Hostility can then be justified as fidelity.
Yet the gospel consistently moves in the opposite direction.
For Barth, fear frequently arises when Christians confuse loyalty to Christ with loyalty to cultural or political structures. When Christianity becomes closely identified with national identity or civilizational boundaries, religious difference begins to appear as a threat to social stability. Faith is then transformed into ideology.
Barth strongly resisted this development in the context of twentieth-century Germany, where Christianity was often invoked in support of nationalist ideology. In rejecting the attempt to align the church with political power, Barth helped articulate the central claim of the Barmen Declaration:
“We reject the false doctrine, as though the church could and would have to acknowledge as a source of its proclamation… other events and powers, figures and truths, as God’s revelation.”¹²
This statement was directed against the attempt to subordinate Christian faith to political ideology. Yet its implications extend beyond that historical moment. Whenever Christianity seeks security through identification with political power, fear of outsiders becomes almost inevitable.
Fear requires enemies.
Hope does not.
Barth’s theology insists that revelation in Christ liberates the church from dependence upon cultural dominance. The truth of the gospel does not require protection through exclusion. Because Christ is Lord, Christians need not secure their identity through opposition to religious others.
Jürgen Moltmann similarly observed that fear often arises when communities attempt to preserve themselves by resisting change. Hope, by contrast, allows believers to live toward the future God has promised rather than clinging anxiously to present structures.
Thomas Aquinas writes:
“Hope is the expectation of those things which faith has believed to have been truly promised by God.”¹³
Hope therefore reorients Christian life away from fear of loss and toward trust in God’s faithfulness. The future of Christianity does not depend upon the defeat of other religions. It depends upon the faithfulness of God.
Fear often reflects a deeper theological uncertainty. When believers feel compelled to defend God through hostility toward others, this may indicate an underlying anxiety that truth itself is fragile. Barth and Moltmann both reject this assumption.
Truth does not require coercion.
Truth invites witness.
Moltmann repeatedly emphasizes that Christian hope generates openness rather than defensiveness. Because the future is grounded in God’s promise, Christians need not respond to difference with suspicion. Hope allows believers to encounter others without perceiving every disagreement as a threat.
Fear narrows imagination.
Hope expands it.
Religious fear can also distort the church’s understanding of mission. When fear dominates Christian imagination, the church may begin to see itself as a fortress protecting truth rather than a community bearing witness to grace. Evangelism becomes competition rather than invitation. Theology becomes boundary maintenance rather than proclamation of reconciliation.
Barth and Moltmann both insist that Christian identity is rooted not in opposition but in participation in God’s reconciling work.
Moltmann writes:
“The church is church only when it exists for others.”¹⁴
This statement challenges any attempt to interpret Christianity as a defensive cultural system. The church does not exist to preserve itself through hostility toward others. It exists to bear witness to God’s reconciling purpose for humanity.
Fear, therefore, is not a reliable guide for Christian theology.
Fear encourages isolation.
Fear encourages caricature.
Fear encourages the assumption that difference must lead to conflict.
Hope, by contrast, allows Christians to encounter Muslims and people of other religious traditions without abandoning conviction. Christian identity remains grounded in Christ, yet this identity no longer depends upon the exclusion of neighbors.
Because the future belongs to God, Christians need not defend faith through hostility.
Faith rooted in hope seeks understanding.
Faith rooted in fear seeks control.
Barth and Moltmann consistently direct the church away from fear and toward confidence in the God who is faithful to his promises.
The church need not create enemies in order to preserve belief.
Confidence in Christ makes fear unnecessary.
Hope makes peace imaginable.
5. Friendship Without Relativism
One of the most common concerns raised when Christians speak positively about friendship with Muslims or members of other religions is the fear that dialogue implies relativism. If Christians affirm cooperation, mutual respect, and peaceful coexistence, some assume that this must mean that doctrinal differences no longer matter. Yet neither Karl Barth nor Jürgen Moltmann supports such a conclusion.
Both theologians insist that Christian faith is centered decisively on the person of Jesus Christ. Christian openness toward others does not arise from uncertainty about Christ but from confidence in him. Dialogue does not weaken conviction; it expresses trust that truth does not require coercion in order to remain true.
Barth’s theology is firmly grounded in the uniqueness of divine revelation in Christ. God is known because God has chosen to make himself known. Knowledge of God is therefore not the result of human speculation but the result of divine grace. Barth writes:
“God reveals Himself. He reveals Himself through Himself. He reveals Himself.”¹⁵
This well-known formulation emphasizes that revelation is entirely God’s initiative. Because revelation depends upon God’s action, Christians cannot produce faith through force or secure truth through exclusion. The truth of Christ stands independent of human defense.
Barth’s insistence on the uniqueness of Christ does not lead to hostility toward those outside the church. Rather, it prevents Christians from placing ultimate confidence in cultural or religious identity markers. Christian faith is grounded in Christ, not in the boundaries Christians construct around themselves.
This insight allows Christians to affirm both conviction and humility simultaneously.
Conviction without humility becomes triumphalism.
Humility without conviction becomes relativism.
Barth rejects both distortions.
Jürgen Moltmann similarly affirms the centrality of Christ while emphasizing that God’s redemptive purpose extends beyond the visible boundaries of the church. Because the future of the world rests in God’s promise, Christians need not assume that dialogue with people of other faiths threatens the integrity of the gospel.
Moltmann writes:
“Where the Spirit is, there is the risen Christ present in the power of the Spirit.".”¹⁶
The presence of Christ through the Spirit means that Christian faith is not sustained by social dominance or political control. The life of the church depends upon the living Christ rather than upon the exclusion of religious others.
Moltmann consistently resists the idea that Christian identity must be preserved through separation from the world. Instead, the church bears witness to Christ precisely through its engagement with the world.
Because Christ is Lord, Christians are freed from anxiety about the existence of other religions. The presence of Islam or any other faith does not threaten the reality of Christ. Dialogue therefore becomes possible without requiring Christians to abandon their theological commitments.
Friendship does not require agreement on every doctrine.
Friendship requires honesty.
Friendship requires humility.
Friendship requires confidence that truth does not depend upon hostility.
Barth’s emphasis on revelation prevents Christians from reducing faith to a human ideology competing in a marketplace of religious systems. Christianity is not one religious option among many constructed by human beings attempting to reach God. Christianity is grounded in God’s movement toward humanity in Christ.
Because faith rests in God’s initiative, Christians need not secure belief through cultural dominance. The truth of Christ is not strengthened by the marginalization of others.
Moltmann’s theology of hope likewise prevents Christians from interpreting religious difference as a permanent threat. The future promised by God is larger than present divisions. Hope allows Christians to encounter Muslims as neighbors rather than adversaries.
Dialogue, therefore, does not relativize Christian faith.
Dialogue reflects confidence in Christ.
When Christians approach others with humility and honesty, they demonstrate trust that God’s truth is not fragile.
Truth does not need fear in order to survive.
Truth invites witness.
Friendship between Christians and Muslims, understood in this theological light, does not compromise the uniqueness of Christ. It reflects confidence that Christ is Lord of all creation.
Christian faith does not require the creation of enemies.
It calls for the love of neighbors.
6. Biblical Foundations for Interfaith Friendship
The theological insights of Karl Barth and Jürgen Moltmann do not stand apart from scripture. Both theologians consistently grounded their work in the biblical witness, particularly in the themes of reconciliation, love of neighbor, and the universal scope of God’s redemptive purpose. The possibility of friendship between Christians and Muslims is therefore not merely a modern adaptation to pluralism but emerges from patterns deeply embedded within the biblical narrative itself.
One of the most significant teachings of Jesus concerning relationships across religious boundaries appears in the parable of the Good Samaritan (Luke 10:25–37). In this parable, the one who fulfills the command to love the neighbor is not a religious insider but a Samaritan, a member of a group often viewed with suspicion and hostility by Jesus’ contemporaries. By presenting the Samaritan as the model of neighborly love, Jesus disrupts assumptions about religious identity and moral superiority.
The question posed in the parable — “Who is my neighbor?” — is answered not by narrowing the definition of neighbor but by expanding it. Neighbor love extends beyond shared religious identity.
Jesus’ teaching in the Sermon on the Mount reinforces this expansive vision:
“Love your enemies and pray for those who persecute you” (Matthew 5:44).
Love of enemy does not imply agreement with every belief or practice. Rather, it reflects confidence that faithfulness to God is not threatened by difference. The command to love extends even to those who stand outside the boundaries of shared conviction.
The apostle Paul demonstrates a similar posture in his encounter with Greek religious culture in Athens (Acts 17:22–28). Rather than beginning with condemnation, Paul acknowledges elements of truth within the religious searching of his audience:
“What therefore you worship as unknown, this I proclaim to you” (Acts 17:23).
Paul neither affirms nor dismisses Athenian religion wholesale. Instead, he engages respectfully while bearing witness to the God revealed in Christ. The encounter models a posture of confidence without hostility.
The Hebrew scriptures likewise anticipate a future in which the nations live in peace rather than perpetual conflict. The prophet Micah envisions a time when peoples of different nations will coexist without violence:
“They shall beat their swords into plowshares… nation shall not lift up sword against nation” (Micah 4:3).
This prophetic vision reflects a hope grounded not in human political achievement but in God’s promised future.
The biblical narrative consistently portrays God’s purposes as extending beyond the boundaries of any single nation or religious community. The covenant with Abraham includes the promise that “all the families of the earth shall be blessed” (Genesis 12:3). The scope of redemption is universal.
Karl Barth frequently emphasized that the gospel cannot be reduced to a tribal identity marker. God’s self-revelation in Christ concerns the whole world, not merely a particular religious community.
Jürgen Moltmann similarly stresses that the kingdom of God involves the renewal of creation as a whole. Christian hope is not limited to the church but anticipates the reconciliation of humanity.
Moltmann writes:
“The salvation of the world includes the redemption of the whole creation.".”¹⁷
Because God’s redemptive purpose encompasses all peoples, Christians cannot assume that religious difference must result in hostility. The biblical witness consistently directs believers toward reconciliation rather than exclusion.
Friendship across religious boundaries therefore reflects continuity with the trajectory of scripture itself. Christians do not love neighbors because doctrinal differences disappear. Christians love neighbors because love reflects the character of God.
Love does not eliminate conviction.
Love transforms how conviction is lived.
The biblical narrative repeatedly demonstrates that God’s purposes extend beyond the boundaries human communities construct. From Abraham’s call to bless the nations to Jesus’ command to love the enemy, scripture invites believers to trust that God’s work is larger than human divisions.
Confidence in God’s purposes allows Christians to encounter Muslims not as threats but as neighbors.
The command to love does not require theological agreement.
It requires faithfulness.
Scripture therefore confirms the theological insights of Barth and Moltmann: faith rooted in trust does not produce fear of others.
It produces openness shaped by hope.
7. The Church as a Sign of the Coming Kingdom
If Christian hope is grounded in God’s promised future, then the church is called to live as a visible sign of that future in the present. Both Karl Barth and Jürgen Moltmann insist that the church does not exist merely to preserve religious tradition or cultural identity. The church exists to bear witness to the reconciling work of God in Christ.
The church therefore does not create the kingdom of God through political dominance, nor does it defend the kingdom through hostility toward those outside its boundaries. Instead, the church anticipates the kingdom by embodying reconciliation, humility, and hope within history.
Karl Barth emphasizes that the church always points beyond itself to Christ. The church is not the kingdom of God, but it serves as a witness to the kingdom. When the church confuses its own institutional life with the fullness of God’s reign, it risks turning faith into ideology.
Barth writes:
“The Church is the earthly-historical form of existence of Jesus Christ himself.”¹⁸
This statement underscores the responsibility of the church to reflect the character of Christ in its life and practice. If Christ reveals God’s reconciling love for the world, then the church’s existence must be shaped by that same reconciling movement.
The church does not exist for itself.
The church exists for the sake of God’s mission to the world.
Jürgen Moltmann similarly argues that the church lives from the future of God’s kingdom. The church is not defined by its ability to control society but by its participation in the coming renewal of creation.
Moltmann writes:
“The church lives from the promise of the future of Christ.”¹⁹
Hope shapes the identity of the church. Because Christians trust in God’s future, they are freed from the need to preserve faith through exclusion or domination. The church becomes a sign of reconciliation precisely when it refuses to treat difference as a threat.
The kingdom of God is not identical with any political order, culture, or religious institution. The kingdom represents the fulfillment of God’s purposes for creation as a whole. The church therefore bears witness to a reality that exceeds its own boundaries.
This theological perspective prevents the church from adopting a defensive posture toward those outside the Christian faith. If the church’s identity rests in God’s promise rather than in social dominance, then religious pluralism need not produce fear.
Instead, pluralism becomes an opportunity for witness shaped by humility.
Barth consistently warned against attempts to align the church too closely with political power. When Christianity becomes identified with cultural dominance, it risks obscuring the distinctiveness of the gospel. The church becomes preoccupied with preserving influence rather than bearing witness to Christ.
Moltmann likewise critiques forms of Christianity that seek security through control rather than hope. The church lives authentically when it trusts that God’s future does not depend upon human coercion.
Because the kingdom belongs to God, Christians need not establish the kingdom through force. The church participates in the coming kingdom through lives shaped by reconciliation.
The church becomes a sign of the kingdom when it demonstrates:
humility rather than triumphalism
confidence rather than fear
hospitality rather than exclusion
hope rather than hostility
Friendship between Christians and Muslims can therefore be understood as part of the church’s witness to the coming kingdom. Such friendship does not imply theological agreement on every point of doctrine. Rather, it reflects confidence that God’s purposes extend beyond the divisions of the present age.
Moltmann emphasizes that Christian hope anticipates the renewal of all things. The future promised by God is not a future of permanent religious conflict but of restored creation.
Because Christians trust in that future, they are able to live differently in the present.
They are able to listen without fear.
They are able to speak truth without hostility.
They are able to bear witness without coercion.
The church does not abandon its confession of Christ when it seeks peace with neighbors of other faiths.
It embodies its confession.
The church becomes credible when its life reflects the reconciling love revealed in Christ.
As a sign of the coming kingdom, the church demonstrates that faith rooted in hope does not produce fear of others.
It produces confidence in God’s future.
And confidence in God’s future makes peace possible.
8. Conclusion: A Theology of Hope in a Religiously Diverse World
The encouragement that Christians and Muslims should pursue friendship has generated both affirmation and concern within contemporary Christian discourse. Some fear that such openness signals a weakening of theological conviction. Others welcome dialogue but struggle to articulate a theological foundation for it. The work of Karl Barth and Jürgen Moltmann provides a framework that addresses both concerns.
Barth’s theology reminds the church that faith rests not in human religious systems but in God’s self-revelation in Jesus Christ. Because revelation is God’s work, Christians do not possess truth as property. The gospel does not require defense through hostility. Truth does not depend upon the exclusion of others in order to remain true.
Barth consistently emphasized that God’s grace precedes human response. The knowledge of God is not a human achievement but a gift grounded in divine freedom. Because God is free, the church cannot claim control over the boundaries of God’s activity.
Barth writes:
“Revelation is the self-disclosure of God...the free act of God's grace.".”²⁰
Revelation is therefore not a possession of the church but the gift through which the church continually receives its identity. Christians bear witness to Christ, but they do not secure Christ through opposition to others.
Jürgen Moltmann complements this insight through his emphasis on hope. Christian faith lives not from fear of difference but from trust in the future God has promised. The resurrection of Christ reveals that history is open toward reconciliation rather than closed within patterns of hostility.
Moltmann writes:
“The raising of Christ is then to be understood as the beginning of the general resurrection of the dead.”²¹
The future revealed in the resurrection is not the triumph of one religious community over another but the renewal of creation itself. Christian hope therefore widens the horizon of faith beyond present divisions.
Because the future belongs to God, Christians need not respond defensively to the existence of other religions. Dialogue does not threaten Christ. Friendship does not weaken conviction. Engagement does not compromise the gospel.
Hope removes the need for fear.
Barth and Moltmann both insist that Christian faith must resist the temptation to align itself with political or cultural domination. Whenever Christianity becomes an identity marker used to distinguish insiders from outsiders, the gospel risks being reduced to ideology. The lordship of Christ cannot be equated with the authority of any nation, civilization, or religious institution.
The Barmen Declaration expresses this conviction with clarity:
“Jesus Christ… is the one Word of God whom we have to hear and whom we have to trust and obey in life and in death.”²²
Because Christ alone is Lord, Christians are freed from the need to defend faith through hostility toward others. The truth of the gospel is not strengthened by fear.
Christian identity is grounded in Christ, not in opposition to neighbors.
Friendship between Christians and Muslims does not imply the erasure of doctrinal differences. Differences remain real and significant. Yet the presence of difference does not require the presence of hostility.
Faith rooted in confidence does not seek enemies.
It seeks faithfulness.
Barth’s emphasis on the freedom of God and Moltmann’s emphasis on the hope of God converge in a shared theological vision: Christian faith is not sustained through exclusion but through trust in God’s promise.
Because God is faithful, Christians are free.
Free to speak truthfully.
Free to listen honestly.
Free to engage peacefully.
Free to love neighbors without fear.
In a world shaped by political polarization and religious suspicion, such freedom offers a powerful witness. The church does not need to resolve every theological difference in order to pursue peace with those of other faiths. It needs only confidence that Christ is Lord and that the future belongs to God.
Christian hope does not erase conviction.
Christian hope makes peace possible.
Friendship between Christians and Muslims, understood in this theological light, is not a departure from historic Christian faith. It is an expression of confidence in the God whose kingdom is greater than every human boundary.
Because the future belongs to God, Christians need not fear dialogue.
They may enter it with humility.
They may enter it with courage. They may enter it with hope.
Endnotes
- Karl Barth, Church Dogmatics I/2, trans. G. W. Bromiley (Edinburgh: T&T Clark, 1956), 300.
(“Religion is unbelief” appears in §17, “The Revelation of God as the Abolition of Religion.” Page numbering varies slightly by edition, but this statement is consistently located near p. 300.) - Jürgen Moltmann, Theology of Hope (Minneapolis: Fortress Press, 1993), 16.
- The Barmen Theological Declaration (1934), Thesis 1.
- Karl Barth, Church Dogmatics I/2, trans. G. W. Bromiley (Edinburgh: T&T Clark, 1956), 300.
- Barth, Church Dogmatics I/2, 280–301. (Section: “The Revelation of God as the Abolition of Religion.”)
- The Barmen Theological Declaration (1934), Thesis 1.
- Karl Barth, Church Dogmatics IV/1, trans. G. W. Bromiley (Edinburgh: T&T Clark, 1956), 7.
- Jürgen Moltmann, Theology of Hope (Minneapolis: Fortress Press, 1993), 16.
- Moltmann, Theology of Hope
- Jürgen Moltmann, The Crucified God (Minneapolis: Fortress Press, 1993), 276.
- Moltmann, Theology of Hope, 18
- The Barmen Theological Declaration (1934), Thesis 1.
- Thomas Aquinas, Summa Theologica II-II
- Jürgen Moltmann, The Church in the Power of the Spirit (Minneapolis: Fortress Press, 1993)
- Karl Barth, Church Dogmatics I/1, trans. G. W. Bromiley (Edinburgh: T&T Clark, 1975)
- Jürgen Moltmann, The Church in the Power of the Spirit (Minneapolis: Fortress Press, 1993)
- Jürgen Moltmann, The Coming of God (Minneapolis: Fortress Press, 1996)
- Karl Barth, Church Dogmatics IV/1, trans. G. W. Bromiley (Edinburgh: T&T Clark, 1956), 661.
- Jürgen Moltmann, Theology of Hope (Minneapolis: Fortress Press, 1993
- Karl Barth, Church Dogmatics I/1, trans. G. W. Bromiley (Edinburgh: T&T Clark, 1975)
- Jürgen Moltmann, Theology of Hope (Minneapolis: Fortress Press, 1993
- The Barmen Theological Declaration (1934), Thesis 1.