自守表示的研究是数学知识统一性的反映。
梦想不是追逐的,而是创造的。
The art of disputation is the art of making the worse appear the better reason.
学得越多,就越意识到自己知道的有多少。
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.