"The cowboys have a way of trussing up a steer or a pugnacious bronco which fixes the brute so that it can neither mov…"

"Euclid taught me that without assumptions there is no proof. Therefore, in any argument, examine the assumptions. The…"

"Guided only by their feeling for symmetry, simplicity, and generality, and an indefinable sense of the fitness of thi…"

"Objections... inspired Kronecker and others to attack Weierstrass' "sequential" definition of irrationals. Neverthele…"

"The pursuit of pretty formulas and neat theorems can no doubt quickly degenerate into a silly vice, but so also can t…"

"Out of fifty mathematical papers presented in brief at such a meeting, it is a rare mathematician indeed who really u…"

"The so-called obvious was repeatedly scrutinized from every angle and was frequently found to be not obvious but fals…"

"Fashion as king is sometimes a very stupid ruler. As was observed a little way back, the kernel of Plücker's theory o…"

"Some of his deepest discoveries were reasoned out verbally with very few if any symbols, and those for the most part …"

"Some, of my unmathematical friends have incautiously urged me to include a note about the origin of modern calculatin…"