The purpose of abstraction is not to be vague, but to create a new semantic level in which one can be absolutely precise.
抽象的目的不是模糊，而是创建一个新的语义层次，在这个层次上可以绝对精确。
I don't like favors; they oppress and make me fell like a slave. I'd rather do everything for myself, and be perfectly independent.
Creativity in science is as important as technical skill.
The moment you stop to think about whether you love someone, you've already stopped loving that person forever.
Give the pupils something to do, not something to learn; and the doing is of such a nature as to demand thinking; learning naturally results.
信仰是对上帝恩典的生动、大胆的信任，如此确定上帝的恩惠，以至于愿意冒着死亡的风险一千次信任它。