给学生一些事情去做，而不是一些东西去学；而这些事情的性质需要思考；学习会自然而然地发生。

"The advantage of poetry over life is that poetry, if it is sharp enough, may last."

真理的最小原子也代表着某个人艰苦的劳动和痛苦。

Everything is hard before it is easy. The day before something is a breakthrough， it’s a stupid idea.

如何道歉：快速、具体、真诚。