过去是一张地图，显示我们曾去过哪里。

Don't write your name on sand, waves will wash it away. Don't write your name in sky, wind may blow it away. Write your name in the hearts of people, that's where it will stay.

每个程序都有（至少）两个目的：一个目的是为它编写的，另一个不是目的。

"The heart has its own geography, its own weather."

心理学的研究就是研究生活中的行动。