John 1:1-5, 9-10

In the beginning was the Word, and the Word was with God, and the Word was God. He was with God in the beginning. Through him all things were made; without him nothing was made that has been made. In him was life, and that life was the light of all mankind. The light shines in the darkness, and the darkness has not overcome it.

The true light that gives light to everyone was coming into the world. He was in the world, and though the world was made through him, the world did not recognize him.