Courtesy costs nothing. Lower the toilet seat after use. Let the people in the elevator exit before you enter. Return shopping carts to their designated areas. When you borrow something， return it better shape (filled up， cleaned) than when you got it.

The study of intelligence must be grounded in the study of symbol systems.

Language is a skin: I rub my language against the other. It is as if I had words instead of fingers, or fingers at the tips of my words.

A sense of responsibility is the mark of a noble character.

我的座右铭是：职业不分贵贱，唯才适用。

人生是由小小的幸福积累而成的。