If you're not stubborn, you'll give up on experiments too soon. And if you're not flexible, you'll pound your head against the wall and you won't see a different solution to a problem you're trying to solve.

The trend is your friend until it ends.

唯一能阻止你的人是你自己。

In saying that someone did something， we may be doing something ourselves.

The body remembers what the mind forgets.

The purpose of life is not to be happy. It is to be useful, to be honorable, to be compassionate, to have it make some difference that you have lived and lived well.

任何一代人最伟大的发现是，一个人可以通过改变态度来改变他的生活。