"A strong body makes the mind strong. As to the species of exercises, I advise the
gun. While this gives moderate exercise to the body, it gives
boldness, enterprise and
independence to the mind. Games played with the ball, and others of that nature, are too violent for the body and stamp no character on the mind. Let your
gun therefore be the
constant companion of your walk."
--
Thomas Jefferson, Foley, ed., Encyclopedia of Thomas Jefferson, p. 318.