It isn't a matter of taking aim and firing a straight shot. If you did that, chances are you'd miss the moon by thousands of miles. For minute variations change the course of flight. If these errors go uncorrected, they become more and more exaggerated, and you miss your window of opportunity. So the faster you recognize, admit and correct your errors, the more precisely you can stay on target.
Success is error driven.
Where you stumble becomes your opportunity to make corrections, to learn and grow. Let me give you a couple of examples. There was a man who was determined to become a public servant. He ran for state legislature and lost. He ran for Congress and lost.