"We are all of us made by what we have lost as much as what we have gained."

沉默是一种语言，它比任何话语都更响亮。

The goal of mathematics is not to solve problems, but to understand them.

君子给人的印象有三种变化：远看庄重威严，接触则温和可亲，听讲话则严肃不苟。

If ease of use was the only requirement, everyone would still be riding tricycles.