Confidence is the Most Important Single Factor in this Game.

The first thing that you must have in learning and training is your confidence, you'll never become if you don't have it.

"Confidence is the most important single factor in this game,
and no matter how great your natural talent, there is only one
way to obtain and sustain it: work."

-- Jack Nicklaus

Other idea..

You will never win and succeed if you don't maintain confidence. It is the sustaining power to