The uniform， constant， and uninterrupted effort of every man to better his condition， the principle from which public and national as well as private opulence is originally derived.

夏天的飞鸟，飞到我窗前唱歌，又飞去了。秋天的黄叶，他们没有什麼可唱的，只是叹息一声，飞落在那里。

Nature is to be followed, but only when it is refined by art.