1 John 4:3-5

Revised Standard Version Catholic Edition

³ and every spirit which does not confess Jesus is not of God. This is the spirit of antichrist, of which you heard that it was coming, and now it is in the world already. ⁴ Little children, you are of God, and have overcome them; for he who is in you is greater than he who is in the world. ⁵ They are of the world, therefore what they say is of the world, and the world listens to them.