D&C 50: 13- 21

Who can drag into daylight and develop the hidden mysteries of the false spirits that so frequently are made manifest among the Latter-day Saints? We answer that no man can do this without the Priesthood, and having a knowledge of the laws by which spirits are governed; for as no man knows the things of God, but by the Spirit of God, so no man knows the spirit of the devil, and his power and influence, but by possessing the intelligence which is more than human, and having unfolded through the medium of the Priesthood the mysterious operations of his devices; without knowing the angelic form, the sanctified look and gesture, and the zeal that is frequently manifested by him for the glory of God, together with the prophetic spirit, the gracious influence, the godly appearance, and the holy garb, which are so characteristic of his proceedings and his mysterious windings.