设定目标的用意不在于非得达成，而在于有个明确方向。

The preservation of the means of knowledge among the lowest ranks is of more importance to the public than all the property of all the rich men in the country.

Lock up your libraries if you like; but there is no gate, no lock, no bolt that you can set upon the freedom of my mind.

"I'm not going to limit myself just because people won't accept the fact that I can do something else."

The only way to do great work is to love what you do.