质量不是承诺；它是一种结果。

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.

The true delight is in the finding out rather than in the knowing.

Innovation without execution is just an idea.