The most certain sign of wisdom is Posted on October 30, 2011October 30, 2006 by admin “The most certain sign of wisdom is cheerfulness.” — Michel de Montaigne Author: Michel de Montaigne Category: wisdom Tags: wisdom, Michel de Montaigne Spread the love Related posts: Sciences may be learned by rote, but Peace is a fragile thing. It takes Even when you have doubts, take that Practical wisdom is only to be learned