"Verily I say unto you, he that is ordained of me and sent forth to preach the word of truth by the Comforter, in the Spirit of truth, doth he preach it by the Spirit of truth or some other way? And if it be by some other way it is not of God" (Doctrine and Covenants 50:17-18). David M. McConkie, Joseph Fielding McConkie, and Sister Julie B. Beck talk about how we can teach by the Spirit.