Happiness in intelligent people is the rarest thing I know.
Ninety-nine percent of the troubles that threaten our civilization come from too optimistic, therefore we should have a system where the accounting is a way more conservative.
对我们森林的最大威胁不是斧头，而是冷漠。
Psychology as the behaviorist views it is a purely objective experimental branch of natural science.
行为主义者眼中的心理学是自然科学的一个纯粹客观的实验分支。