Coaching isn't a great mystery. It's Just hard work, determination, and inspiration at the right moment.
Source: In The Book of Football Wisdom, ed. by Criswell Freeman, 1996.
-- Bob Zuppke, (Jul 2 1879-1957), US football coach; Zupp is credited with introducing (in the early 1920s) the offensive huddle, enabling the team with the ball to plan each play before executing it.