"Don't flatter yourself that friendship authorizes you to say disagreeable things to your intimates. The nearer you come into relation with a person, the more necessary do tact and courtesy become. Except in cases of necessity, which are rare, leave your friend to learn unpleasant things from his enemies; they are ready enough to tell them."

- Oliver Wendell Holmes (1809 - 1894), The Autocrat of the Breakfast-Table, 1858