Ephesians 4:32
Be kind to one another, tender-hearted, forgiving each other, just as God in Christ also has forgiven you.

There is no danger of carrying it too far. Let the rule be observed, “As God has forgiven you, so do you forgive others.”
Let a man recollect his own sins and follies; let him look over his life, and see how often he has offended God; let him remember that all has been forgiven; and then, fresh with this feeling, let him go and meet an offending brother, and say, “My brother, I forgive you. I do it frankly, fully, wholly. So Christ has forgiven me; so I forgive you. The offence shall be no more remembered. It shall not be referred to in our contact to harrow up your feelings; it shall not diminish my love for you; it shall not prevent my uniting with you in doing good. Christ treats me, a poor sinner, as a friend; and so I will treat you.”