The Christian doctrine of God (Trinity) in the context of philosophy and religion. The question of God touches on fundamental human issues, such as the questions of viable knowledge of God as well as the origin, purpose, and meaning of life. Matthias Haudel discusses the Christian concept of God within the context of religion, philosophy, and natural science. He unfolds the understanding of the Trinity in its significance for all areas of theology and simultaneously introduces the foundations of theology and dogmatics, as well as their central subjects. This is done with a historical and ecumenical breadth, taking into account current concepts of the doctrine of God. The volume enables an appropriate communication of theological fundamentals and reveals the significance of the Trinity for theology, the church, and the world. Matthias Haudel has written a doctrine of God for students.