It's better to keep your mouth shut and give the impression that you're stupid than to open it and remove all doubt.
Rami Belson {Category: Wisdom and Ignorance}
The Devil's Dictionaryby Ambrose BierceAlice's Adventures in Wonderlandby Lewis CarrollThe College Blue Book63 more aphorism-related titles and other products in the Shopping section.
Origin of Quote, by AlvinGo to the forum for this aphorism or this author.