数学之美在于它能够揭示看似复杂事物背后的简单性。

孔子说：“明智的人喜欢水，仁慈的人喜欢山；明智的人好动，仁慈的人好静；明智的人快乐，仁慈的人长寿。”

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.

你可能无法改变现实，但你可以改变你对现实的态度，而这，矛盾的是，会改变现实。