The Lord instructed Peter to forgive the trespasser 490 times, Then came Peter to him, and said, Lord, how oft shall my brother sin against me, and I forgive him? Till seven times? Jesus saith unto him, I say not unto thee, Until seven times; but, Until seventy times seven (Matt 18:21-22). While we are required to forgive up to 490 times, the Lord, in his infinite mercy, has placed no limit on the number of transgressions for which he will grant forgiveness. This is comforting for those of us who have already offended him on more than 490 occasions.
"One of Satan's most cunning ways to lead men on in wrongdoing is craftily to make them believe in the uselessness of repentance. 'I have gone too far to repent; there is no forgiveness for me.' That is not true. 'Yea,' the Lord said to Alma, 'And as often as my people repent will I forgive them their trespasses against me.' Of course there is forgiveness for everyone, if it were not so, God's great purposes would fail and this we do not believe. The poor sheep may be lost in the wood, hungry and helpless and cold, hunted by the wolf, falling over the precipice. 'But the Good Shepherd is on His way and is looking for it, and will find it. And will take it into His arms and will carry it to the fold' and will rejoice that the lost is found and the dead is again alive." (Reynolds and Sjodahl, Commentary on the Book of Mormon, vol. 2, p. 268)