Michel de Montaigne – Continual cheerfulness; sign of wisdom Share this quote: The most manifest sign of wisdom is a continual cheerfulness; her state is like that of things in the regions above the moon, always clear and serene. – Michel de Montaigne Is this quotation insightful, though-provoking, useful? Click on a star to rate it! Submit Rating Average rating 4 / 5. Vote count: 1