Christianity is one of the three major world religions. Like Jews and Muslims, Christians believe in one God who created the world and takes an interest in the humans who inhabit it. The authors of the New Testament took for granted the existence of the God of the Old Testament. They believed in Yahweh, "the God of Abraham, Isaac and Jacob," whom the Jews worshiped as the one true God. Like the Old Testament, the New Testament teaches that there is only one God , who is pure in spirit, the creator of the world, holy and good, all-powerful and worthy of mankind's worship and love. God expects ethical behavior and will judge wrongdoers. The New Testament especially emphasizes God's love for the world and his desire to save all people. Where the New Testament differs from the Old Testament in its teachings about God is in its proclamation that God has chosen to reveal himself to mankind through Christ, the Incarnation of God. Especially in the Gospel of John, it is emphasized that Jesus alone knows the Father completely and he came to help humans know the Father better:
- John 3:35 - "The Father loves the Son and has placed everything in his hands."
- John 7:16: "My teaching is not my own. It comes from him who sent me."
- John 14:9-10: "Anyone who has seen me has seen the Father. How can you say, 'Show us the Father?' Don't you believe that I am in the Father, and that the Father is in me?"
- Romans 1:17: "For in the gospel a righteousness from God is revealed."