According to Christian theology (based on the New Testament), Jesus is the Son of God and God in the flesh (the Incarnation). This is a central belief of Christianity, often understood through the doctrine of the Trinity.

The Bible affirms God's existence and describes Him as creator, all-powerful (omnipotent), all-knowing (omniscient), all-present (omnipresent), and perfectly loving and just.

The word of God has the power to reveal to us certain things that we could not know in any other way. For example: How and when the world was created. The reason man is the way he is - sin. The true nature of God. What happens to us after we die. Human beings could study and speculate on these things for a thousand years and come up with many theories, but that's all they'd be, just theories...