1 John 4:1-3

Douay-Rheims 1899 American Edition

4 Dearly beloved, believe not every spirit, but try the spirits if they be of God: because many false prophets are gone out into the world.

² By this is the spirit of God known. Every spirit which confesseth that Jesus Christ is come in the flesh, is of God:

³ And every spirit that dissolveth Jesus, is not of God: and this is Antichrist, of whom you have heard that he cometh, and he is now already in the world.