Address at the Sorbonne, Paris, 23 Apr. 1910. Richard M. Nixon quoted this passage in his address to the nation announcing his decision to resign the presidency, 8 Aug. 1974. See Theodore Roosevelt 1; Theodore Roosevelt 2; Theodore Roosevelt 5
Fellowship of Christian Athletes, John Wooden (2010). “The Greatest Coach Ever: Timeless Wisdom and Insights of John Wooden”, p.101, Gospel Light Publications