The companies that will succeed are those that view environmental challenges as business opportunities.

The interplay between discrete and continuous mathematics is where some of the most interesting problems lie.

我告诉你，德并不是用钱买来的，但是德却可以带来金钱。

一本书是作者与读者之间无限的对话。

死者既已安葬,活着的人就不要长久地哭泣,而应该尽快做事,每个人都做自己能做的事,并用来使大家互利。

To write is to explore the unknown territories of the self.