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

“Beauty, like all other qualities presented to human experience, is relative; and the definition of it becomes unmeaning and useless in proportion to its abstractness. To define beauty not in the most abstract, but in the most concrete terms possible, not to find a universal *formula* for it, but the *formula* which expresses most adequately this or that special manifestation of it, is the aim of the true student of aesthetics.”

—Walter Pater (1839–1894)

“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)

“The source of Pyrrhonism comes from failing to distinguish between a demonstration, a *proof* and a probability. A demonstration supposes that the contradictory idea is impossible; a *proof* of fact is where all the reasons lead to belief, without there being any pretext for doubt; a probability is where the reasons for belief are stronger than those for doubting.”

—Andrew Michael Ramsay (1686–1743)

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

—Friedrich Nietzsche (1844–1900)