Science is the crystallization of human wisdom and an important force driving social progress.

The writer’s joy is the thought that can become emotion, and the emotion that can wholly become a thought.

The greatest enemy of a good plan is the dream of a perfect plan.

聪明人说话，是因为有些话要说；蠢人说话，则因为要说些话。

The more we have, the more we want.

一个心理过程的价值在于它的生存效用。