When you put down the good things you ought to have done, and leave out the bad ones you did do — well, that’s Memoirs.
Will Rogers (1879-1935) American humorist
Essay (1932-03-12), “Letters of a Self-Made Diplomat to Senator Borah,” Saturday Evening Post
(Source)
William Borah (1885-1940) was a US Senator from Idaho (1907-1940). He was progressive politically, but an isolationist, a key figure in blocking US approval of the Versailles Treaty or joining the League of Nations.
Collected in Donald Day (ed.), The Autobiography of Will Rogers (1949), and Steven K Gragert (ed.), More Letters of a Self-Made Diplomat (1982).