心灵是构建生存策略的工坊。

Mathematics knows no races or geographic boundaries; for mathematics, the cultural world is one country.

生活的目的不是快乐。它是有用的，是光荣的，是富有同情心的，是让你活得有意义，活得好。

The true teacher defends his pupils against his own personal influence. He inspires self-trust. He guides their eyes from himself to the spirit that quickens him. He will have no disciple.

人最珍贵的是生命，生命最珍贵的是道。