
Quote from a program at a Coolidge memorial service (1933); cited in The Oxford Dictionary of Quotations (1999). The passage did not originate with Coolidge, but evolved over several decades, appearing as early as 1881 in a youth guidance book. From [Garson O’Toole, https://quoteinvestigator.com/2016/01/12/persist/, Purpose and Persistence Are Required for Success: Unrewarded Genius Is Almost a Proverb, Quote Investigator, January 12, 2016]
1930s