To do mathematics is to explore a universe of ideas, where the only limit is your imagination.

The most dangerous phrase in business is: "We've always done it this way."

The best stories are those that challenge our perceptions.

奈奎斯特准则提供了一种图形方法来确定闭环系统的稳定性。

The world is a great garden, and we are the flowers.

译文：做好事就会被人传遍百世，做坏事就会被人憎恶万年。赏析：人做好事自然就有美名被传颂，人做坏事自然就会受人谴责。人做好事不仅给自己积德，更是给子孙后代积福；人做坏事不仅玷污自己的名节，更会伤害到子孙后代。