Try the spirits wheather they are from God

1Beloved, believe not every spirit, but try the spirits whether they are of God: because many false prophets are gone out into the world. 2Hereby know ye the Spirit of God: Every spirit that confesseth that Jesus Christ is come in the flesh is of God: 3And every spirit that confesseth not that Jesus Christ is come in the flesh is not of God: and this is that spirit of antichrist, whereof ye have heard that it should come; and even now already is it in the world. 4Ye are of God, little children, and have overcome them: because greater is he that is in you, than he that is in the world. 5They are of the world: therefore speak they of the world, and the world heareth them. 6We are of God: he that knoweth God heareth us; he that is not of God heareth not us. Hereby know we the spirit of truth, and the spirit of error.