We must not be afraid to be wrong, for only by being wrong can we learn and progress.

唯一比思想的力量更伟大的是心灵的勇气。

It's easy to perform for others, but hard to perform for yourself.

The first fruit of this imagination—and the first lesson of the social science that embodies it—is the idea that the individual can understand his own experience and gauge his own fate only by locating himself within his period, that he can know his own chances in life only by becoming aware of those of all individuals in his circumstances.

雇佣许多人去做一件复杂的事，往往是错误的。数量永远不如质量 (三个臭皮匠不一定比一个诸葛亮强)，人多降低效率，增加成本。