1 John 4:1-3

Delightfully loved friends, don’t trust every spirit, but carefully examine what they say to determine if they are of God, because many false prophets have mingled into the world. Here’s the test for those with the genuine Spirit of God: they will confess Jesus as the Christ who has come in the flesh. Everyone who does not acknowledge that Jesus is from God has the spirit of antichrist, which you heard was coming and is already active in the world.