United States. President (1901-1909 : Roosevelt), Theodore Roosevelt (1906). “Message of the President of the United States Communicated to the Two Houses of Congress at the Beginning of the Second Session of the Fifty-ninth Congress”
Quoted in'A RogersThesaurus' inThe Saturday Review, 25 Aug 1962. Another form of the quote appeared in a syndicated newspaper article,15 Feb1925: 'Heroing is one of the shortestlived professions there is'.