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.
Hold on to your dreams, even if the whole world doubts you.
数学家最好的工作往往来自于在别人看不到联系的地方发现联系。