Success is not the key to happiness. Happiness is the key to success. If you love what you are doing, you will be successful.

Change the way you look at things and the things you look at change.

很多时候，我们都需要面对选择。如果都有好处，就要取其中好处最大的；如果都有害处，就取其中害处最小的。

时间是一种持久的存在，它包含了过去、现在和未来。