God revealed himself in Jesus Christ! The Christian faith has professed and proclaimed this for 2000 years. What is he saying? Jesus of Nazareth did not work long in Galilee and Jerusalem, perhaps only a year. He healed people, taught them, but also caused horror, fear and hatred. Individuals saw: Here is more than one great teacher and prophet. Since his crucifixion and resurrection appearances, people have testified: Jesus Christ lives - he lives in a new form. The risen and exalted Christ works in the power of his Spirit. He is God of God, he has creative power. Large sections of humanity can be won over to the kingdom of Christ. Many people, however, misuse his name for self-serving ends, even for their own interests in power and conquest. But he persistently works through his word, his spirit. His kingdom is persistently coming: in love and mercy, in the search for truth and justice, in powers of exaltation and redemption. The powers of this kingdom awaken in people a passion to deepen their knowledge of God and to seek justice. They are emergent in many acts of love and forgiveness. They also radiate publicly, often in a secularized and political way, among people who strive for education and health care for all, who want to shape free communities and civil societies and who continue to demand unconditional respect for human rights and human dignity. The emanating powers of this kingdom promise and characterize fulfilled life - on a small and large scale, temporally and eternally. Michael Welker's Christology, now in its fourth edition, opens up these connections. With this she answers the question of what the Christian faith says when it testifies: God reveals himself in Jesus Christ.