Oliver Wendell Holmes

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.

Jane Austen

Here and there, human nature may be great in times of trial; but generally speaking, it is its weakness and not its strength that appears in a sick chamber: it is selfishness and impatience rather than generosity and fortitude, that one hears of. There is so little real friendship in the world! and unfortunately, there are so many who forget to think seriously till it is almost too late.