" Whether you attack or yield, you are reacting. You are off track, no longer focused on the prize—the protection of your core interests and needs. Yielding rewards the other’s abusive behavior, and counterattacking reinforces it. In either case, you interrupt the other’s process of accepting our No. The choice is yours. The moment you react to the other’s reaction, you are initiating an action-reaction cycle that can go on forever. The alternative is not to react but rather to stay true to your underlying Yes. Keep your focus on what matters to you. "

― William Ury , The Power of a Positive No: How to Say No and Still Get to Yes