Lord Indra was worried Maharaja Prthu might steal away some of his power and prestige, so he stole one of the horses for the sacrifice that Prthu was doing,and when he realized he had done wrong, he took shelter of Lord Visnu who then told Prthu to forgive Indra, which he did.
So even the Lord wants us to be forgiving to an errant devotee. It is actually the will of the Lord that we be forgiving , so if I claim to love the Lord, I must be forgiving so that He may be pleased with me, otherwise w