I say to you that Satan would tell you nineteen
truths and would perform nineteen miracles to get
you to accept one untruth and to take a wrong step.
That is the kind of power he exercises. Do not be
deceived, my brethren and sisters. Try the spirits, and
see whether they are of God or not. Cling to the
authority of the Priesthood, which God sent His
messengers to bestow upon man. If you do so, I will
assure you, as a servant of God, you will be led back
into the presence of God and the Lamb.
(Brian H. Stuy, ed., Collected Discourses, 5 vols. [Burbank,
Calif., and Woodland Hills, Ut.: B.H.S. Publishing, 1987-1992], 3: