When men are most sure and arrogant they are commonly most mistaken， giving views to passion without that proper deliberation which alone can secure them from the grossest absurdities.

The only way to find out anything about what kinds of books people would like to read is to publish books and see what happens.

On the path of science, there are no smooth roads to take; only those who are not afraid of hard work and climb the steep mountain paths have the hope of reaching the glorious summit.

I think the key to directing is to be open to change.

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.