A theory should not attempt to explain all the facts, because some of the facts are wrong.

Courage is a virtue necessary not only in war, but in life as well.

最好的皮革讲述着品质、道德和永恒的故事。

语出西汉·桓宽《盐铁论·申韩》。国家不愁没有法制，而是怕没有切实可行的法制。说明制定法律应能够施行。