1 John 4:2-5

2By this you know the Spirit of God: Every spirit that confesses Jesus as the Christ who has come in the flesh is from God,

3but every spirit that does not confess Jesus is not from God, and this is the spirit of the antichrist, which you have heard is coming, and now is already in the world.

4You are from God, little children, and have conquered them, because the one who is in you is greater than the one who is in the world.

5They are from the world; therefore they speak from the world’s perspective and the world listens to them.