Repay Evil for Evil

"In the old days, people demanded 'an eye for an eye and a tooth for a tooth,' and to repay evil for evil. Patience was not yet on the earth, because faith was not on the earth either. Of course, impatience made full use of the opportunities the Law gave it. That was easy when the Lord and Master of patience was not here. But now that he has come and put the grace of faith together with patience, we are no longer allowed to attack someone even with a word—not even to call someone a fool without facing the danger of judgment. The Law found more than it lost when Christ said, 'Love your enemies and pray for those who persecute you, so that you may be sons of your Father who is in heaven' (Matthew 5:44-45). This most important commandment summarizes in a word the universal discipline of patience, since it does not allow us to do evil even to people who deserve it."—Tertullian