做出伟大工作的唯一方法就是热爱你所做的事。

终点总是比你想象的更近。

在数学中，最深刻的思想往往源于最简单的观察。

The only purpose for which power can be rightfully exercised over any member of a civilized community， against his will， is to prevent harm to others.

谁是神智健全的人？我能把他治好。