John 1:10

The same came as a witness, that he might testify about the light, that all might believe through him.

He was not the light, but was sent that he might testify about the light.

The true light that enlightens everyone was coming into the world.

He came to his own, and those who were his own didn’t receive him.

But as many as received him, to them he gave the right to become God’s children, to those who believe in his name:

who were born, not of blood, nor of the will of the flesh, nor of the will of man, but of God.