For art to exist, for any sort of aesthetic activity to exist, a certain physiological precondition is indispensable: intoxication. – Friedrich Nietzsche
Poets do not go mad; but chess-players do. Mathematicians go mad, and cashiers; but creative artists very seldom. – Gilbert Keith Chesterton, Orthodoxy
Beware of him that is slow to anger for when it is long coming, it is the stronger when it comes, and the longer kept. Abused patience turns to fury. – Francis Quarles