1 John 4:2-3

2 By this ye know the Spirit of God: Every spirit that confesseth that Jesus Christ hath come in the flesh, is from God:
3 And every spirit that confesseth not that Jesus Christ is come in the flesh, is not from God. And this is that [spirit] of antichrist, of which ye have heard that it should come; and even now already it is in the world.
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