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.

信任是通过行动赢得的，而不是言语。

幸福的秘诀是面对这个世界很可怕的事实。

做数学的过程比结果更重要。