生命的意义在于发现你的天赋，生活的目的是把它奉献出去。
The meaning of life is to find your gift. The purpose of life is to give it away.
The only way to have a friend is to be one.
正义的轮子转动缓慢，但却极其精细。
The true test of a mathematical idea is its ability to inspire further thought.
With a library you are free, not confined by temporary political climates. It is the most democratic of institutions because no one - but no one at all - can tell you what to read and when and how.
数学不是一项观赏性运动。你必须参与其中。
唯一能拯救世界的是重新发现人类的灵魂。
People who cannot find time for recreation are obliged sooner or later to find time for illness.