Mind over matter, people! According to this video, when you change your mind, you physically change your brain.

It looks as if the power of thought is an immense gift that each of us hold (sans 'Honey Boo Boo' viewers). As the video states, "imagining an action and doing it require the same motor and sensory programs in the brain..." Therefore, it would be safe for one to conclude that a strong mental drive to accomplish something helps largely in having a successful outcome.

But don't get the video wrong; thinking you can sing like Adele does not actually propose that you can sing like Adele. So... keep that in your thoughts.