When a man feels throbbing within him the power to do what he undertakes as well as it can possibly be done, this is happiness, this is success.
Orison Swett MardenWho would have ever heard of Theodore Roosevelt outside of his immediate community if he had only half committed himself? The great secret of his career was that he has flung his whole life with all the determination and energy he could muster.
Orison Swett Marden