The most important thing in life is not simply to capitalize on your gains. Any fool can do that. The important thing is to profit from your losses. That requires intelligence, and makes the difference between a man of sense and a fool.
Dale CarnegieLet's never try to get even with our enemies, because if we do we will hurt ourselves far more than we hurt them. Let's do as General Eisenhower does: let's never waste a minute thinking about people we don't like.
Dale CarnegieIf you do something for someone else, never remember. If someone does something for you, never forget.
Dale CarnegieBe a balanced optimist. Nobody is suggesting that you become an oblivious Pollyanna, pretending that nothing bad can or ever will happen. Doing so can lead to poor decisions and invites people to take advantage of you. Instead, be a rational optimist who takes the good with the bad, in hopes of the good ultimately outweighing the bad, and with the understanding that being pessimistic about everything accomplishes nothing. Prepare for the worst but hope for the best - the former makes you sensible, and the latter makes you an optimist.
Dale Carnegie