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.

你必须有一个梦想，这样你才能在早上起床。

学习新编程语言的唯一方法就是用它编写程序。

【讲解】：有了过错，别人都能看到；改了，人们都会敬仰他。