1John 4:2-3 Hereby know you the Spirit of God: Every spirit that confesses that Jesus Christ is come in the flesh is of God: And every spirit that confesses not that Jesus Christ is come in the flesh is not of God: and this is that spirit of antichrist, whereof you have heard that it should come; and even now already is it in the world.
2John 1:7 For many deceivers are entered into the world, who confess not that Jesus Christ is come in the flesh. This is a deceiver and an antichrist.
The Word Becomes Flesh Gospel of John Chapter 1:14-18
And the Word became flesh and dwelt among us, and we beheld His glory, the glory as of the only begotten of the Father, full of grace and truth. John bore witness of Him and cried out, saying, “This was He of whom I said, ‘He who comes after me is preferred before me, for He was before me.’”
And of His fullness we have all received, and grace for grace. For the law was given through Moses, but grace and truth came through Jesus Christ. No one has seen God at any time. The only begotten Son, who is in the bosom of the Father, He has declared Him