Never stop questioning how things can be done better—complacency is the enemy of progress.
学校不应该只是一个学习的地方，而是一个激发学习的地方。
The existence of the natural world is the same kind of fact as the existence of any proposition.
"最危险的怪物是我们内心携带的那些。"
History is that certainty produced at the point where the imperfections of memory meet the inadequacies of documentation.
The act of writing is an act of courage.