当课堂只追求“有趣”，知识就失去了厚度。

The only real failure in life is not to be true to the best one knows.

我是一个作家，而不是一个演说家。

"The truth is rarely pure and never simple."

But I miss you, Jenny. If there's anything you need... I won't be far away.

我相信伟大的教师就是伟大的艺术家，而且这样的艺术家和其他任何伟大的艺术家一样稀少。教学甚至可能是最伟大的艺术，因为它的媒介是人的思想和精神。

"The act of writing is an act of courage, a defiance against the silence of the universe."