Some of my favourites...
#110-1. There are two ways of exerting one's strength: one is pushing down, the other is pulling up.
-Booker T. Washington
#110-2. You are not only responsible for what you say, but also for what you do not say.
-Martin Luther King
#110-3. The uncreative mind can spot wrong answers, but it takes a very creative mind to spot wrong questions.
The first one should be a poster stuck on the desk of everyone who is a boss.
Many creative solutions have emerged when the problem statement itself was re-examined and redefined. It is a healthy thinking habit to acquire, spend a few moments to study the question or issue before plunging into analysis of solutions.