One of the strongest motives that lead men to art and science， is escape from everyday life with its painful crudity and hopeless dreariness， such men make this cosmos and its construction in the pivot of their emotional life， in ordered to find the peace and the security， which they cannot find in the narrow whirlpool of personal experience.

To love truth for truth's sake is the principal part of human perfection in this world, and the seed-plot of all other virtues.

"The weight of history is carried by those who remember."

The smallest details often carry the most meaning.

心理生活是一个整体，这一普遍陈述可以毫不犹豫地接受。

The most profound ideas in mathematics often come from asking the simplest questions.