I feel it is hard to pick favorites, I value any quote that can serve as a rule of thumb. Here are a few. My two top favorites: "What I can not create I can not understand." - Richard Feynman "The full use of your powers along lines of excellence. " - definition of "happiness" by John F. Kennedy (1917-1963) A few on how to act: "If you are going through hell, keep going." - Sir Winston Churchill (1874-1965) "Every normal man must be tempted at times to spit upon his hands, hoist the black flag, and begin slitting throats." - Henry Louis Mencken (1880-1956) "Hope is not a course of action." - USMC Colonel Michael O'Neal "Man is most nearly himself when he achieves the seriousness of a child at play." - Heraclitus, Greek philosopher (500 B.C.) "Blessed is the man, who having nothing to say, abstains from giving wordy evidence of the fact." - George Eliot (1819-1880) "When you have to kill a man, it costs nothing to be polite. " - Sir Winston Churchill (1874-1965) "You can get more with a kind word and a gun than you can with a kind word alone. " - Al Capone (1899-1947) "The man who does not read good books has no advantage over the man who cannot read them. " - Mark Twain (1835-1910) And a few more that I find amusing: "Blondes make the best victims. They're like virgin snow that shows up the bloody footprints." - Alfred Hitchcock "A narcissist is someone better looking than you are. " - Gore Vidal "No excellent soul is exempt from a mixture of madness." - Aristotle "I do not feel obliged to believe that the same God who has endowed us with sense, reason, and intellect has intended us to forgo their use. " - Galileo Galilei "Now, now my good man, this is no time for making enemies." - Voltaire (1694-1778) on his deathbed in response to a priest asking that he renounce Satan.