It may not be easy and not come quickly

"If there be any who nurture in their hearts the poisonous brew of enmity toward another, I plead with you to ask the Lord for strength to forgive. This expression of desire will be of the very substance of your repentance. It may not be easy, and it may not come quickly. But if you will seek it with sincerity and cultivate it, it will come. And…. there will come into your heart a peace otherwise unattainable. That peace will be the peace of Him who said: 'For if ye forgive men their trespasses, your heavenly Father will also forgive you: 'But if ye forgive not men their trespasses, neither will your Father forgive your trespasses.'" (Gordon B Hinckley)