VW-Edition Bible (2010)1 John - chapter 4, verses 1 - 3
1 Beloved, do not believe every spirit, but test the spirits, to see whether they are from God; because many false prophets have gone forth into the world.
2 By this you know the Spirit of God: Every spirit that confesses that Jesus Christ has come in the flesh is from God,
3 and every spirit that does not confess that Jesus Christ has come in the flesh is not from God. And this is the spirit of the Antichrist, which you have heard was coming, and is now already in the world.