It is a common experience that a problem difficult at night is resolved in the morning after the committee of sleep has worked on it.

Believe nothing you hear， and only one half that you see.

——在神户高等女校对神户商业会议所等五团体演讲，1924年11月28日

人的行动是他们思想的最佳诠释者。

Mathematics is not a careful march down a well-cleared highway, but a journey into a strange wilderness, where the explorers often get lost.

语言越精确，世界就越神秘。