自然不作飞跃。（拉丁文，指自然界的演变是连续的而非跳跃的）

The mother-child relationship is paradoxical and, in a sense, tragic. It requires the most intense love on the mother's side, yet this very love must help the child grow away from the mother, and to become fully independent.

求知若饥，虚心若愚。

Mathematics is the art of asking the right questions and then finding their answers.

那些把别人当作不如人类的人，当他们投在水面上的面包毒化后漂回来时，不应感到惊讶。

流放不是地点，而是一种状态。