“In reaching the place where it is written, “And forgive us our debts, as we forgive our debtors,” we have to think whether we have offended anyone in any way but never asked forgiveness for this. Or, has anyone ever asked us to forgive his mistake and we did not forgive him? If I don’t do what it says in the prayer, it means that I am lying when I pray, and I am not a true child of God.”
(Elder Proclu+ of Romania in pravoslavie.ru)