" There are two ways the linchpin can use “no.” The first is to never use it. There’s a certain sort of indispensable team member who always finds a yes. She always manages to find a way to make things happen, and she does it. It’s done. Yes. Those people are priceless. Amazingly, there’s a second kind of linchpin. This person says “no” all the time. She says no because she has goals, because she’s a practical visionary, because she understands priorities. She says no because she has the strength to disappoint you now in order to delight you later. "

― Seth Godin , Linchpin: Are You Indispensable?