Collaboration beats competition when it comes to long-term progress.

所有模型都是错误的，但有些是有用的。

The best way to cheer yourself up is to try to cheer somebody else up.

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.