“If you do not accuse each other, God will not accuse you. If you have no accuser you will enter heaven, and if you will follow the revelations and instructions which God gives you through me, I will take you into heaven as my back load. If you will not accuse me, I will not accuse you. If you will throw a cloak of charity over my sins, I will over yours—for charity covereth a multitude of sins.” (Joseph Smith, History of the Church, 4:445.)
"Knowledge saves a man; and in the world of spirits no man can be exalted but by knowledge. So long as a man will not give heed to the commandments, he must abide without salvation. If a man has knowledge, he can be saved; although, if he has been guilty of great sins, he will be punished for them. But when he consents to obey the gospel, whether here or in the world of spirits, he is saved." (Joseph Smith, HC 14:15 p. 314)
Time Required to Repent
"Repentance does not require a time period. Look at Alma the Younger, the sons of Mosiah, and the Apostle Paul. Now these were encounters with God, but so were the conversions of many of the Lamanites. (Alma 18: 40-42; 22: 18, among others.)
"The Lord tells you to repent. If you do, He remembers your sins no longer. Confess and forsake them, and you will be forgiven. (D&C 58: 42-43.) Or, in other words, change. Turn away from your sins and face God instead.
"All those labors performed by Alma the Younger, the sons of Mosiah, and the Apostle Paul, after repentance, were not to obtain forgiveness. They were the "fruit" of repentance, or the result of the new direction that they were heading. (See Matt. 3: 8; Luke 3: 8; Alma 5: 62; 13: 13; Moroni 8: 24-26.)