Joseph Smith
“Strange as it may appear at first thought, yet it is no less strange than true, that…apostates after turning from the faith of Christ, unless they have speedily repented, have sooner or later fallen into the snares of the wicked one, and have been left destitute of the Spirit of God, to manifest their wickedness in the eyes of multitudes…When once that light which was in them is taken from them, they become as much darkened as they were previously enlightened, and then, no marvel, if all their power should be enlisted against the truth, and they, Judas like, seek the destruction of those who were their greatest benefactors.” (Teachings of the Prophet Joseph Smith, p. 67)
Neal A. Maxwell
“Willful dissent ages ago [among the Nephites] produced yet other symptoms that are worthy of our pondering today as life confronts us with determined dissenters who leave the Church—but who then cannot leave the Church alone.” (Plain and Precious Things, p. 72)
Neal A. Maxwell
“Then there are the dissenters who leave the Church, either formally or informally, but who cannot leave it alone. Usually anxious to please worldly galleries, they are critical or at least condescending towards the Brethren. They not only seek to steady the ark but also on occasion give it a hard shove! Often having been taught the same true doctrines as the faithful, they have nevertheless moved in the direction of dissent (see Alma 47:36). They have minds hardened by pride (see Daniel 5:20).” (Men and Women of Christ, p. 4)