I have called this principle, by which each slight variation, if useful, is preserved, by the term Natural Selection.  

Collaboration across borders is essential in ocean conservation. Fish don't recognize political boundaries.

家中的事情，尽可外传，就可了解君子的家法是如何的端正无瑕；亲近的人，都恭敬谨肃，就可了解君子对自身要求多么严格正派。

我们进步的考验不在于我们为那些拥有很多的人增添更多，而在于我们是否为那些拥有太少的人提供足够。