A pessimist sees the difficulty in every opportunity; an optimist sees the opportunity in every difficulty.

爱音乐的人永远不会孤独。

怀疑是智慧的开始。

I don't live in the past, I don't live in the future, I live in the present.

只要有一个程序，我们将永远不会用完所有要编程的东西。