The only way we could remember would be by constant re-reading, for knowledge unused tends to drop out of mind. Knowledge used does not need to be remembered; practice forms habits and habits make memory unnecessary. The rule is nothing; the application is everything.

Henry Stuart Hazlitt (November 28 1894 – July 9 1993) was an American economist philosopher literary critic and journalist for such publications as The Wall Street Journal The Nation The American Mercury Newsweek and The New York Times and he has been recognized as a leading interpreter of economic issues from the perspective of American conservatism and libertarianism.