" The greatest managers in the world do not have much in common. They are of different sexes, races, and ages. They employ vastly different styles and focus on different goals. But despite their differences, these great managers do share one thing: Before they do anything else, they first break all the rules of conventional wisdom. They do not believe that a person can achieve anything he sets his mind to. They do not try to help a person overcome his weaknesses. They consistently disregard the Golden Rule. And, yes, they even play favorites. Great managers are revolutionaries, although few would use that word to describe themselves. This book will take you inside the minds of these managers to explain why they have toppled conventional wisdom and reveal the new truths they have forged in its place. We are not encouraging you to replace your natural managerial style with a standardized version of theirs — as you will see, great managers do not share a “standardized style.” Rather, our purpose is to help you capitalize on your own style, by showing you how to incorporate the revolutionary insights shared by great managers everywhere. "

― Marcus Buckingham , First, Break All the Rules: What the World's Greatest Managers Do Differently