存心养性要谦抑专一，如春天般的舒缓温和；自察反省要谨慎严格，像秋天般冷峻严肃。

法律义务的概念对于理解法律至关重要。

水产养殖的潜力远未被完全挖掘。

A sound mind in a sound body, is a short, but full description of a happy state in this World: he that has these two, has little more to wish for; and he that wants either of them, will be little the better for anything else. Men’s happiness or misery is most part of their own making. He, whose mind directs not wisely, will never take the right way; and he, whose body is crazy and feeble, will never be able to advance in it.

If you're not failing, you're not trying hard enough.