The deity of Jesus

“In the beginning was the Word, and the Word was with God, and the Word was God.” (John 1:1 ESV)

The Son from the Father became flesh and dwelt among us

“And the Word became flesh and dwelt among us, and we have seen his glory, glory as of the only Son from the Father, full of grace and truth.” (John 1:14 ESV)

Jesus and the Father are one

“I and the Father are one.” (John 10:30 ESV)

The whole fullness of deity 

“For in him the whole fullness of deity dwells bodily.” (Col. 2:9 ESV)

Therefore…

“Great indeed, we confess, is the mystery of godliness: He was manifested in the flesh, vindicated by the Spirit, seen by angels, proclaimed among the nations, believed on in the world, taken up in glory.” (1 Tim. 3:16 ESV) 

“Whoever confesses that Jesus is the Son of God, God abides in him, and he in God.” (1 John 4:15 NKJV)

Quote:

“I am trying here to prevent anyone saying the really foolish thing that people often say about Him: I’m ready to accept Jesus as a great moral teacher, but I don’t accept his claim to be God. That is the one thing we must not say. A man who was merely a man and said the sort of things Jesus said would not be a great moral teacher. He would either be a lunatic — on the level with the man who says he is a poached egg — or else he would be the Devil of Hell. You must make your choice. Either this man was, and is, the Son of God, or else a madman or something worse. You can shut him up for a fool, you can spit at him and kill him as a demon or you can fall at his feet and call him Lord and God, but let us not come with any patronizing nonsense about his being a great human teacher. He has not left that open to us. He did not intend to.” - C.S. Lewis, Mere Christianity