爱的最伟大证明是牺牲。
La plus grande preuve d'amour, c'est le sacrifice.
你必须为每一分而战,就像它是最后一分一样。
The art of teaching is the art of assisting discovery.
Thinking consists in envisaging, realizing structural features and structural requirements.
宁可让儿童一个字也不识,也不要使他为了学到这一些学问而把其他有用的东西都牺牲了。
The universe is not required to be in perfect harmony with human ambition.