Every word carries the weight of all the words that could have been spoken instead.

承认规则作为一种社会事实存在。

"In the study of computational complexity, we often find that the boundaries of what is possible are defined by the limits of our imagination."

The problem of quality management is not what people don't know about it. The problem is what they think they do know.

Life is too short to hold grudges.

Freedom is a condition of mind,and the best way to secure it is to breed it.