The Church and the Kingdom of God

Introduction: Is the Church the Kingdom?

The relationship between the church and the kingdom of God is one of the most important—and most misunderstood—questions in theology. Are they the same thing? Is the church the kingdom? Is the kingdom broader than the church? Does the church build the kingdom, or does the kingdom build the church?

The answers to these questions have enormous practical consequences. If the church is the kingdom, then the church's institutional life exhausts the meaning of God's reign. If the kingdom is broader than the church, then Christians can speak of God's kingdom activity outside the church—in politics, culture, science, and social reform. If the church builds the kingdom through its efforts, then the kingdom's progress depends on human initiative. If the kingdom is God's sovereign act, then the church's role is receptive and responsive rather than constructive.

This lesson examines the biblical teaching on the kingdom of God and its relationship to the church, seeking clarity on a topic that has generated enormous confusion.

The Kingdom of God: A Definition

The kingdom of God (or "kingdom of heaven" in Matthew's Gospel) was the central theme of Jesus' preaching. "The time is fulfilled, and the kingdom of God is at hand; repent and believe in the gospel" (Mark 1:15). But what did He mean?

The kingdom of God is best understood as the sovereign reign of God— His dynamic, saving rule over His people and His creation. It is not primarily a place (though it has a place) or an institution (though it has institutional expression). It is God's kingship in action—His authority exercised, His will accomplished, His enemies defeated, and His people redeemed.

The Old Testament anticipated the kingdom: God would establish His rule, defeat evil, redeem His people, and restore creation (Isaiah 11; Daniel 2:44; 7:13–14). The Jews of Jesus' day expected a political kingdom—a restored Davidic monarchy that would overthrow Rome and establish Israel as the world's ruling nation.

Jesus fulfilled these expectations—but in unexpected ways. The kingdom came not through military conquest but through a crucified Messiah. It was inaugurated not in a palace but in a stable. Its power was displayed not through force but through self-giving love. And it was offered not to Israel alone but to "all nations" (Matthew 28:19).

Already and Not Yet

The most important framework for understanding the kingdom is inaugurated eschatology—the conviction that the kingdom has been inaugurated (already) but not yet consummated (not yet). The kingdom is present now and is still coming in its fullness.

The kingdom is already present. Jesus declared that the kingdom "has come upon you" (Matthew 12:28). He cast out demons, healed the sick, forgave sins, and raised the dead—all signs that God's reign had broken into the present age. The kingdom is present wherever Christ rules—in the hearts of believers, in the life of the church, and in every act of obedience to the King.

The kingdom is not yet fully realized. Jesus taught His disciples to pray, "Your kingdom come" (Matthew 6:10)—indicating that the kingdom's fullness is future. Evil persists. Suffering continues. Sin remains. Death still reigns (for now). The kingdom will be consummated only at Christ's return, when He will judge the living and the dead, defeat every enemy, and make all things new (Revelation 21:1–5).

The "already/not yet" framework protects against two errors. Over-realized eschatology claims too much for the present— it expects the church to eradicate poverty, establish perfect justice, and transform culture before Christ returns. It leads to utopianism and inevitable disillusionment. Under-realized eschatology claims too little for the present—it treats the kingdom as entirely future, making the church a waiting room for heaven with no transformative impact on the present age. The biblical balance is that the kingdom is genuinely present and genuinely future—tasted now, consummated later.

The Relationship Between Church and Kingdom

How then does the church relate to the kingdom? Several affirmations are important.

The church is not identical to the kingdom. The kingdom of God is broader than the church. God's reign extends over all creation—not only over the gathered community of believers. Christ is Lord of the universe, not merely Lord of the church. The kingdom is at work wherever God's will is done—in the justice of civil governments, in the discoveries of science, in the beauty of art—even when the agents of these goods do not acknowledge the King.

The church is the primary manifestation of the kingdom. While the kingdom is broader than the church, the church is the community that explicitly acknowledges the King, submits to His rule, and proclaims His reign to the world. The church is where the kingdom is most clearly visible—in the preaching of the gospel, the celebration of the sacraments, the exercise of discipline, and the fellowship of the saints. George Eldon Ladd put it well: the church is the community of the kingdom, the instrument of the kingdom, and the custodian of the kingdom—but it is not the kingdom itself.

The church does not build the kingdom. This may be the most important corrective. The kingdom is God's work, not ours. God gives the kingdom (Luke 12:32); humans do not construct it. The church receives the kingdom, witnesses to the kingdom, enters the kingdom—but it does not build the kingdom. The language of "building the kingdom" suggests that the kingdom's advance depends on human effort—that if we work hard enough, organize effectively enough, and transform enough cultural institutions, we can bring the kingdom to earth. This is a subtle form of works-righteousness applied to eschatology.

Implications for the Church's Life

Understanding the relationship between church and kingdom has several practical implications.

The church should be a signpost of the kingdom. The church's life together—its justice, its mercy, its reconciliation, its worship—should give the world a preview of what the consummated kingdom will look like. When the church practices forgiveness, it previews a world without grudges. When it welcomes the outcast, it previews a world without exclusion. When it worships the King, it previews eternity.

The church should resist the temptation to establish the kingdom by force. The kingdom comes through the Word and Spirit, not through political power, cultural domination, or institutional control. Every attempt to identify the kingdom with a political program, a nation, or a cultural movement confuses the kingdom of God with the kingdoms of this world—a confusion that has produced some of the worst chapters in church history.

The church should live in hope. The "not yet" dimension of the kingdom means that the church will never fully transform this present age. There will always be suffering, injustice, and evil until Christ returns. This is not pessimism; it is realism—a realism that protects against disillusionment and anchors the church's hope in the return of Christ rather than in the progress of civilization.

Conclusion: Living Between the Times

The church lives between the times—between the inauguration of the kingdom at Christ's first coming and its consummation at His second. In this "between" time, the church worships the King, proclaims the kingdom, displays the kingdom in its corporate life, and prays with longing expectation: "Your kingdom come."

The church does not need to save the world—Christ has already done that. The church does not need to build the kingdom—God is doing that. The church's calling is simpler and more profound: to be faithful—to preach the Word, to celebrate the sacraments, to love one another, to serve the suffering, and to bear witness to the King until He comes again.