经济周期不仅仅是围绕某个平滑趋势的波动，而是经济受到根本性冲击的结果。

The curious paradox is that when I accept myself just as I am, then I can change.

爱不是有限的资源。你给予的越多，你拥有的就越多。

创新源于好奇心与坚持的结合。

"With a library you are free, not confined by temporary political climates. It is the most democratic of institutions because no one - but no one at all - can tell you what to read and when and how."

在私利面前能够想到道义，遇到危难能够挺身而出，虽然长期生活在贫困之中，也没有忘记平生的诺言，这样就可以说是一个十全十美的人了。