The French aviator and author Antoine de Saint-Exupery once offered a definition of engineering elegance: “A designer knows he has achieved perfection not when there is nothing left to add, but when there is nothing left to take away.” A designer of simple ideas should aspire to the same goal: knowing how much can be wrung out of an idea before it begins to lose its essence.
Excerpt from: Made to Stick: Why some ideas take hold and others come unstuck by Chip Heath and Dan Heath