一本书是脆弱的生物，它承受时间的磨损，害怕啮齿动物、自然元素和笨拙的手。因此，图书管理员不仅要保护书籍免受人类的伤害，还要保护它们免受自然的侵害，并将一生奉献给与遗忘力量的斗争。

The true test of leadership is not what you do when you're being watched, but what you do when you're alone.

Poetry should surprise by a fine excess and not by singularity—it should strike the reader as a wording of his own highest thoughts, and appear almost a remembrance.

The secret of change is to focus all of your energy not on fighting the old, but on building the new.

Inquiry into reality begins with the recognition of our ignorance.

自守形式的研究是数学对称性之美的反映。