About life, the wisest men of all ages have come to the same conclusion: it is no good. Always and everywhere one has heard the same sound from their mouths—a sound full of doubt, full of melancholy, full of weariness of life, full of resistance to life. Even Socrates said, as he died: “To live—that means to be sick a long time: I owe Asclepius the Savior a rooster.” Even Socrates was tired of life. What does that prove? What does it demonstrate? At one time, one would have said (and it has been said loud enough by our pessimists): “At least something must be true here! The consensus of the sages must show us the truth.” Shall we still talk like that today? May we? “At least something must be sick here,” we retort. These wisest men of all ages—they should first be scrutinized closely. Were they all perhaps shaky on their legs? tottery? decadent? late? Could it be that wisdom appears on earth as a raven, attracted by a little whiff of carrion?
—Friedrich Nietzsche, Twilight of the Idols.