You have known men who, while in the Church, were active, quick and full of intelligence; but after they have left the Church, they have become contracted in their understandings, they have become darkened in their minds and everything has become a mystery to them, and in regard to the things of God, they have become like the rest of the world, who think, hope and pray that such and such things may be so, but they do not know the least about it. This is precisely the position of those who leave this Church; they go into the dark, they are not able to judge, conceive or comprehend things as they are. They are like the drunken man—he thinks that everybody is the worse for liquor but himself, and he is the only sober man in the neighborhood. The apostates think that everybody is wrong but themselves. 16:65.
You hear many say, "I am a Latter-day Saint, and I never will apostatize"; "I am a Latter-day Saint, and shall be to the day of my death." I never make such declarations, and never shall. I think I have learned that of myself I have no power, but my system is organized to increase in wisdom, knowledge, and power, getting a little here and a little there. But when I am left to myself, I have no power, and my wisdom is foolishness; then I cling close to the Lord, and I have power in his name. I think I have learned the Gospel so as to know, that in and of myself I am nothing. 1:337.
If you want to see the principle of devilism to perfection, hunt among those who have once enjoyed the faith of the holy Gospel and then forsaken their religion. We have the best and the worst. Why the worst? Because the Devil prompts men and women of the meanest and lowest grade to embrace the Gospel and get a foothold in the Kingdom of God to destroy it. 7:145.
People do, however, leave this Church, but they leave it because they get into darkness, and the very day they conclude that there should be a democratic vote, or in other words, that we should have two candidates for the presiding Priesthood in the midst of the Latter-day Saints, they conclude to be apostates. There is no such thing as confusion, division, strife, animosity, hatred, malice, or two sides to the question in the house of God; there is but one side to the question there. 14:92.
If the Saints neglect to pray, and violate the day that is set apart for the worship of God, they will lose his Spirit. If a man shall suffer himself to be overcome with anger, and curse and swear, taking the name of the Deity in vain, he cannot retain the Holy Spirit. In short, if a man shall do anything which he knows to be wrong, and repenteth not, he cannot enjoy the Holy Spirit, but will walk in darkness and ultimately deny the faith. 11:134.
What have the Latter-day Saints got to apostatize from? Everything that there is good, pure, holy, God-like, exalting, ennobling, extending the ideas, the capacities of the intelligent beings that our Heavenly Father has brought forth upon this earth. What will they receive in exchange? I can comprehend it in a very few words. These would be the words that I should use: death, hell and the grave. That is what they will get in exchange. We may go into the particulars of that which they experience. They experience darkness, ignorance, doubt, pain, sorrow, grief, mourning, unhappiness; no person to condole with in the hour of trouble, no arm to lean upon in the day of calamity, no eye to pity when they are forlorn and cast down; and I comprehend it by saying death, hell and the grave. This is what they will get in exchange for their apostasy from the Gospel of the Son of God. 16:160.
Why do people apostatize? You know we are on the "Old Ship Zion." We are in the midst of the ocean. A storm comes on, and, as sailors say, she labors very hard. "I am not going to stay here," says one; "I don't believe this is the 'Ship Zion.'" "But we are in the midst of the ocean." "I don't care, I am not going to stay here." Off goes the coat, and he jumps overboard. Will he not be drowned? Yes. So with those who leave this Church. It is the "Old Ship Zion," let us stay in it. 10:295.
Will there still be apostasy? Yes, brethren and sisters, you may expect that people will come into the Church and then apostatize. You may expect that some people will run well for a season, and then fall out by the way. 2:250.
Many receive the Gospel because they know it is true; they are convinced in their judgment that it is true; strong argument overpowers them, and they are rationally compelled to admit the Gospel to be true upon fair reasoning. They yield to it, and obey its first principles, but never seek to be enlightened by the power of the Holy Ghost; such ones frequently step out of the way. 2:250.
What has already become of those who, during our short existence as a Church, have come out against us, politically, judicially, or otherwise, those who have raised their puny arms to destroy the Kingdom of God from the earth! They have become powerless, like the dew before the rising sun; they have vanished away, their names are almost forgotten; and if this is not the case with all, it will be. 18:232.