But now let me return to my theme of the many changes that have taken place since I was last here. There is a jocular saying: 'To improve is to change; to be perfect is to have changed often.' I had to use that once or twice in my long career.

Address to a joint session of Congress, Washington, D.C., January 17, 1952 "We Must Not Lose Hope", in The Great Republic : A History of America (2000), Churchill, Random House, p. 399 ISBN 0375764407