1 John 4:2-3 NLT

2 This is the way to find out if they have the Spirit of God: If a prophet acknowledges that Jesus Christ became a human being, that person has the Spirit of God.
3 If a prophet does not acknowledge Jesus, that person is not from God. Such a person has the spirit of the Antichrist. You have heard that he is going to come into the world, and he is already here.