By this ye know the Spirit of God: Every spirit that confesseth that Jesus Christ hath come in the flesh, is from God:

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.

And we know that the Son of God hath come, and hath given us an understanding, that we may know him that is true, and we are in him that is true, even in his Son Jesus Christ. This is the true God, and eternal life.