数学不仅仅是人类的发明；它具有一种独立于我们而存在的深刻现实。
天籁，风吹万窍声音不同，都是自由自在地发声或停止，毋需外力的支配。
预测未来的最好方法是研究过去。
Freedom would be not to choose between black and white but to abjure such prescribed choices.
The tree of liberty must be refreshed from time to time with the blood of patriots and tyrants.
You have to think anyway, so why not think big?