Following are excerpts of a discourse the Prophet Joseph Smith delivered in the vicinity of Commerce, later Nauvoo, Ill., in 1839:
"Ever keep in exercise the principle of mercy, and be ready to forgive our brother on the first intimations of repentance, and asking forgiveness; and should we even forgive our brother, or even our enemy, before he repent or ask forgiveness, our heavenly Father would be equally merciful unto us. . . .
"O ye Twelve! and all Saints! profit by this important Key - that in all your trials, troubles, temptations, afflictions, bonds, imprisonments and death, see to it, that you do not betray heaven; that you do not betray Jesus Christ; that you do not betray the brethren; that you do not betray the revelations of God, whether in the Bible, Book of Mormon, or Doctrine and Covenants, or any other that ever was or ever will be given and revealed unto man in this world or that which is to come. Yea, in all your kicking and flounderings, see to it that you do not this thing, lest innocent blood be found upon your skirts, and you go down to hell. All other sins are not to be compared to sinning against the Holy Ghost, and proving a traitor to the brethren.
"I will give you one of the Keys of the mysteries of the Kingdom. It is an eternal principle, that has existed with God from all eternity: That man who rises up to condemn others, finding fault with the Church, saying that they are out of the way, while he himself is righteous, then know assuredly, that that man is in the high road to apostasy; and if he does not repent, will apostatize, as God lives. The principle is as correct as the one that Jesus put forth in saying that he who seeketh a sign is an adulterous person; and that principle is eternal, undeviating, and firm as the pillars of heaven; for whenever you see a man seeking after a sign, you may set it down, that he is an adulterous man. . . ." (History of the Church 3:385.)
