I'm a firm believer that in the theory that people only do their best at things they truly enjoy. It is difficult to excel at something you don't enjoy.
Source: In The Golfer's Book of Wisdom, ed. by Criswell Freeman, 1995.
-- Jack Nicklaus, (Jan 21 1940-____), US golfer; He was the dominating figure in world golf from the 1960s to the 1980s.