数学研究是所有智力和精神进步不可或缺的基础。

The mark of mediocrity is to look for precedent.

一个品牌的力量在于它能够适应而不失去其核心身份。

There is no such thing as a moral or an immoral book. Books are well written, or badly written.

We are all bound by the laws of our own natures.