1 John 4:3
“And every spirit that confesseth not that Jesus Christ is come in the flesh is not of God: and this is that spirit of antichrist, whereof ye have heard that it should come; and even now already is it in the world.”
Beloved, believe not every spirit, but try the spirits whether they are of God: because many false prophets are gone out into the world.
Hereby know ye the Spirit of God: Every spirit that confesseth that Jesus Christ is come in the flesh is of God:
And every spirit that confesseth not that Jesus Christ is come in the flesh is not of God: and this is that spirit of antichrist, whereof ye have heard that it should come; and even now already is it in the world.
Ye are of God, little children, and have overcome them: because greater is he that is in you, than he that is in the world.
They are of the world: therefore speak they of the world, and the world heareth them.
Why This Verse Was Tagged
This verse contains specific terms directly associated with this theme.
This verse contains specific terms directly associated with this theme.
Counter-Arguments
The strongest case that this verse does not belong in this theme.

Cross-References
“Little children, it is the last time: and as ye have heard that antichrist shall come, even now are there many antichrists; whereby we know that it is the last time.”
“Who is a liar but he that denieth that Jesus is the Christ? He is antichrist, that denieth the Father and the Son.”
“Who is a liar but he that denieth that Jesus is the Christ? He is antichrist, that denieth the Father and the Son.”
“Hereby know ye the Spirit of God: Every spirit that confesseth that Jesus Christ is come in the flesh is of God:”
“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.”