Never apologize, mister, it’s a sign of weakness.

Never apologize and never explain - it's a sign of weakness.

Never say sorry - it's a sign of weakness

Here the first of the things that happened, happened. The first of the things important enough to notice and to remember afterward, among a great many trifling but kindred ones that were not. Some so slight they were not more than gloating, zestful glints of eye or curt hurtful gestures. (Once he accidentally poured a spurt of scalding tea on the back of a waitress' wrist, by not waiting long enough for the waitress to withdraw her hand in setting the cup down, and by turning his head momentarily the other way. The waitress yelped, and he apologized, but he showed his teeth as he did so, and you don't show your teeth in remorse).

Apologizing does not always mean you're wrong and the other person is right. It just means you value your relationship more than your ego.

Nothing says you're sorry like a dead bunny.