1 John 4:2-3
2-3Here's how you test for the genuine Spirit of God. Everyone who confesses openly his faith in Jesus Christ—the Son of God, who came as an actual flesh-and-blood person—comes from God and belongs to God. And everyone who refuses to confess faith in Jesus has nothing in common with God. This is the spirit of antichrist that you heard was coming. Well, here it is, sooner than we thought!
4-6My dear children, you come from God and belong to God. You have already won a big victory over those false teachers, for the Spirit in you is far stronger than anything in the world. These people belong to the Christ-denying world. They talk the world's language and the world eats it up. But we come from God and belong to God. Anyone who knows God understands us and listens. The person who has nothing to do with God will, of course, not listen to us. This is another test for telling the Spirit of Truth from the spirit of deception.