If the other person injures you, you may forget the injury; but if you injure him you will always remember.
— Kahlil Gibran

The pleasure of those who injure you lies in your pain. Therefore they will suffer if you take away their pleasure by not feeling pain.
Tertullian injures quote

To injure an opponent is to injure yourself. To control aggression without inflicting injury in the Art of Peace.
— Morihei Ueshiba

As, for the safety of society, we commit honest maniacs to Bedlam, so judges should be withdrawn from their bench, whose erroneous biases are leading us to dissolution. It may indeed injure them in fame or in fortune; but it saves the republic, which is the first and supreme law.
— Thomas Jefferson

While the people retain their virtue, and vigilance, no administration, by any extreme of wickedness or folly, can very seriously injure the government, in the short space of four years.
— Abraham Lincoln