1 John 4:5-6

5Those false prophets belong to this world. Their message comes from the ideas of people of this world. So the people of this world believe what they teach.

6But we belong to God. Everyone who knows God believes our message. But anyone who does not belong to God does not believe it. So that is how we know if someone's message comes from God's Spirit or not. God's Spirit brings us a true message, but false spirits tell lies.