As pointed out by msvan, the quote is actually by Xunzi.
Here is the original text in Chinese:
I know what you are thinking `Why would you post something in Chinese? How could non-Chinese speakers understand?' and the reason is I want y'all to check out this super cool add of for Firefox: https://addons.mozilla.org/en-us/firefox/addon/perapera-kun-... With this plugin, the meanings of the words show up onmouseover and you can pretty much get the meaning.