Consistency is the key of the success! Not the motivation...

Apple. Orange. One needs both for long term success. Motivation can result in one-shot wonders like [i]To Kill A Mockingbird[/i] or numerous single-hit recordings. Consistency can lead to remarkable careers with no particular standout achievement, but a noteworthy steady level of contributions that can be counted upon. To have both is remarkable and puts you in the pantheon of all time greats.