Jesus is the eternal Word who was with God and was God, playing a central role in creation and being the source of life and light.
John the Baptist was sent as a witness to testify about the true light, preparing the way for Jesus and proclaiming his superiority.
Through belief in Jesus and acceptance of him as the Son of God, people can become children of God and receive eternal life.
Jesus performed miracles and signs to reveal his glory and confirm his divine identity.
The theme of light and darkness symbolizes the contrast between good and evil, belief and unbelief, and serves as a call to choose the light of Jesus.