Andy Stanley

When a plan or strategy fails, people are tempted to assume it was the wrong vision. Plans and strategies can always be changed and improved. But vision doesn't change. Visions are simply refined with time.

There will be very few occasions when you are absolutely certain about anything. You will consistently be called upon to make decisions with limited information. That being the case, your goal should not be to eliminate uncertainty. Instead, you must develop the art of being clear in the face of uncertainty.