成功不是终点，失败也不是致命的，继续前进的勇气才是关键。

Sometimes the most profound mathematics comes from playing with simple ideas until they reveal their hidden complexity.

There are only two ways of telling the complete truth--anonymously and posthumously.

惩罚时不避忌权贵，奖赏时不遗忘地位低下的人。

即使在抽象中，数学也具有深远的现实应用。