The toughest opponent of all is Old Man Par. He's a patient soul who never shoots a birdie and never incurs a bogey. And if you would travel the long road with him, you must be patient, too.
Source: In The Golfer's Book of Wisdom, ed. by Criswell Freeman, 1995.
-- Bobby Jones, (Mar 17 1902-1971), US golfer; He was the first man to achieve the Grand Slam--winning in a single year the four major golf tournaments.