Nothing can be called failure until you accept it as such. You can transmute all past failures and mistakes into assets. Adversity is Nature's method of disciplining people to learn to take possession of their own minds. Greatest blessings often come from the greatest adversities. Study yourself carefully and you may discover that your own emotions are your greatest handicap in the business of accurate thinking.
Far better to think historically, to remember the lessons of the past. Thus, far better to conceive of power as consisting in part of the knowledge of when not to use all the power you have. Far better to be one who knows that if you reserve the power not to use all your power, you will lead others far more successfully and well.