Joseph Smith

“Let me say unto you, seek to purify yourselves, and also all the inhabitants of Zion, lest the Lord’s anger be kindled to fierceness. Repent, repent, is the voice of God to Zion; and strange as it may appear, yet it is true, mankind will persist in self-justification until all their iniquity is exposed, and their character past being redeemed, and that which is treasured up in their hearts be exposed to the gaze of mankind. I say to you (and what I say to you I say to all,) hear the warning voice of God, lest Zion fall, and the Lord swear in His wrath the inhabitants of Zion shall not enter into His rest” (Teachings of Presidents of the Church: Joseph Smith, p. 187).