" takes a great deal of character strength to apologize quickly out of one’s heart rather than out of pity. A person must possess himself and have a deep sense of security in fundamental principles and values in order to genuinely apologize. People with little internal security can’t do it. It makes them too vulnerable. They feel it makes them appear soft and weak, and they fear that others will take advantage of their weakness. Their security is based on the opinions of other people, and they worry about what others might think. In addition, they usually feel justified in what they did. They rationalize their own wrong in the name of the other person’s wrong, and if they apologize at all, it’s superficial. "
― Stephen R. Covey , The 7 Habits of Highly Effective People: Powerful Lessons in Personal Change