Lehi in the Desert, Nibley, pp. 113-115; D&C 98:23-33; 132:36; Jacob 4:5; Deut. 13:6-10
“That which is wrong under any circumstance may be and often is, right under another … Whatever God requires is right, no matter what it is, although we may not see the reason thereof till long after the events transpire.” (Teachings of the Prophet Joseph Smith, pp. 255-256)
“The Lord is merciful, always merciful, and do you not think it is a merciful act, if people become so filled with disease and corruption through sin, and when they have turned away from God, and they are teaching their posterity all the evil which they themselves know, for the Lord to remove them from the face of the earth so they will not contaminate the generations yet to come and lead them to eternal destruction?” (Joseph Fielding Smith, Signs of the Times, pp. 95-96)