No one likes having offended another person; hence everyone feels so much better if the other person doesn't show he's been offended. Nobody likes being confronted by a wounded spaniel. Remember that. It is much easier patiently -- and tolerantly -- to avoid the person you have injured than to approach him as a friend. You need courage for that.
Ludwig Josef Johann Wittgenstein (April 26, 1889 April 29, 1951) was an Austrian philosopher who contributed several ground-breaking works to modern philosophy, primarily on the foundations of logic, the philosophy of language, and the philosophy of mind. He is widely regarded as one of the most influential philosophers of the 20th century.