数学不是观赏性运动——你必须参与其中才能欣赏它的美。

"The serve is the most important shot in tennis."

对智能的研究必须基于对符号系统的研究。

The most beautiful as well as the most ugly inclinations of man are not part of a fixed biologically given nature, but result from the social process which creates man.

过去塑造现在，现在塑造未来。

和我一起变老吧！最好的还在后头。