真理如同金子，不是靠它的增长，而是靠洗去一切不是金子的东西来获得。

一个好的数学家是能看到定理之间类比的人；一个伟大的数学家是能看到类比之间的类比的人。

The very shaping of history now outpaces the ability of men to orient themselves in accordance with cherished values. And which values? Even when they do not panic, men often sense that older ways of feeling and thinking have collapsed and that newer beginnings are ambiguous to the point of moral stasis.