### Famous quotes containing the words formula, theorem, proof and/or sketch:

“So, if we must give a general *formula* applicable to all kinds of soul, we must describe it as the first actuality [entelechy] of a natural organized body.”

—Aristotle (384–323 B.C.)

“To insure the adoration of a *theorem* for any length of time, faith is not enough, a police force is needed as well.”

—Albert Camus (1913–1960)

“He who has never failed somewhere, that man can not be great. Failure is the true test of greatness. And if it be said, that continual success is a *proof* that a man wisely knows his powers,—it is only to be added, that, in that case, he knows them to be small.”

—Herman Melville (1819–1891)

“We criticize a man or a book most sharply when we *sketch* out their ideal.”

—Friedrich Nietzsche (1844–1900)