" To keep a team cohesive, you need both rock stars and superstars, she explained. Rock stars are solid as a rock. Think the Rock of Gibraltar, not Bruce Springsteen. The rock stars love their work. They have found their groove. They don’t want the next job if it will take them away from their craft. Not all artists want to own a gallery; in fact, most don’t. If you honor and reward the rock stars, they’ll become the people you most rely on. If you promote them into roles they don’t want or aren’t suited for, however, you’ll lose them—or, even worse, wind up firing them. Superstars, on the other hand, need to be challenged and given new opportunities to grow constantly. "

― Kim Malone Scott , Radical Candor: Be a Kickass Boss Without Losing Your Humanity