In the beginning was the Word, and the Word was with God, and the Word was God. 2 He was in the beginning with God. 3 All things were made through Him, and without Him nothing was made that was made. 4 In Him was life, and the life was the light of men. 5 And the light shines in the darkness, and the darkness did not [a]comprehend it.
John 1:1-5
John starts as Genesis did, and reveals that in the beginning was the Word, the Word was with God, and the Word WAS God. His Holy breath made that Word flesh, the completed creation that is God in flesh, Jesus Christ. Jesus and God are One. Know Christ, know the Father. Know the Father, and you will know Jesus Christ.
He made all things, nothing has been made that was not made by Him. He is the light of Creation and Life, the light of all men. No darkness could ever overcome the perfect light of Jesus Christ.