唯一存在的限制是你脑海中的限制。

There is no such thing as a special category of science called applied science; there is science and its applications, which are related to one another as the fruit is related to the tree that has borne it.

我不害怕说出我的想法。

最大的风险就是不冒任何风险。

Psychology is a science, and teaching is an art; and sciences never generate arts directly out of themselves.

译文：连续地打仗，百姓就会感到劳苦；长期打仗，士兵就会感到疲惫。

The dream of every dictator is to turn his country into a prison without walls.

You don't need a perfect voice to move people; you just need to sing from the heart.