Motivation is the fire within. If someone else tries to light that fire under you, chances are it will burn briefly. -Stephen Covey.
There's no sense to living and working with a lack of passion and heart. In fact, when done, it's more exhausting than if he/she had done it right the first time. Think about it...how often has anyone ever gotten in trouble by working hard with integrity? Even when mistakes are made and failures are experienced, we reach deep down in our inner being and find a way to be successful. Success most often comes from failure, but it never comes if we give up after failing. Therefore, let your mistakes and failures build a better "you;" a person with character and integrity. It is especially gratifying when we "just do it" ourselves.