1 John 4:1-6

1 Beloved, believe not every spirit, but try the spirits whether they are of God: because many false prophets have gone out into the world.

2 By this ye know the Spirit of God: Every spirit that confesseth that Jesus Christ hath come in the flesh, is from God:

3 And every spirit that confesseth not that Jesus Christ is come in the flesh, is not from God. And this is that [spirit] of antichrist, of which ye have heard that it should come; and even now already it is in the world.

4 Ye are of God, little children, and have overcome them: because greater is he that is in you, than he that is in the world.

5 They are of the world: therefore they speak from the world, and the world heareth them.

6 We are of God. He that knoweth God, heareth us; he that is not of God, heareth not us. By this we know the spirit of truth, and the spirit of error.