A 'new thinker', when studied closely, is merely a man who does not know what other people have thought.
Source: In The Concise Columbia Dictionary of Quotations, by Robert Andrews, 1989
-- Frank Moore Colby, (Feb 10 1865-1925), US encyclopedia editor, essayist; His collection of essays, The Colby Essays, 1921, includes On Seeing Ten Bad Plays and Trials of an Encyclopedist.