教育的艺术必须是引导孩子达到能够自我教育的程度。
The art of education must be to bring the child to the point where he can educate himself.
The most important thing about a theory is that it explains the facts.
死者无法为正义呐喊。为死者伸张正义是生者的责任。
发现的喜悦无疑是人类心灵所能感受到的最活跃的体验。