Better to know a few things which are good and necessary than many things which are useless and mediocre.

Better to know a few things which are good and necessary than many things which are useless and mediocre.

宁可知道少数好的必要的东西，也不要知道许多无用的平庸的东西。

-- Ralph Waldo Emerson 拉尔夫·沃尔多·爱默生