John 1:9-12, 18

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. He came to that which was his own, but his own did not receive him. Yet to all who did receive him, to those who believed in his name, he gave the right to become children of God

No one has ever seen God, but the one and only Son, who is himself God and is in closest relationship with the Father, has made him known.