George Sheehan may refer to: (wikipedia)
We may think there is willpower involved, but more likely change is due to want power. Wanting the new addiction more than the old one. Wanting the new me in preference to the person I am now.
If you want to win anything- a race, yourself, your life- you have to go a little berserk
If you want to win anything -- a race, your self, your life -- you have to go a little berserk.