We must be free not because we claim freedom, but because we practice it.

法治是一种政治理想，而不是法律理想。

"I think that mathematicians are much more like artists than they are like scientists."

对自身的优点，要掩藏几分，这是用涵养化育来培养深沉的品格；对别人的缺点，要掩藏几分，这是用朴实厚重来造就博大的胸怀。