Doctrine and Covenants 58:42

When we repent, the Lord forgives and forgets our sins.

42 Behold, he who has repented of his sins, the same is forgiven, and I, the Lord, remember them no more.

Elder Neal A. Maxwell said:

“Repentance is a rescuing, not a dour doctrine. It is available to the gross sinner as well as to the already-good individual striving for incremental improvement.”

(“Repentance,” Ensign, Nov. 1991, 30.)