H.L. Mencken (1880–1956) American journalist and writer
" What I Believe http://www.unz.org/Pub/Forum-1930sep-00133" in The Forum 84 (September 1930), p. 136 <br class="br">1930s <br class="br">Context: Men become civilized, not in proportion to their willingness to believe, but in proportion to their readiness to doubt. The more stupid the man, the larger his stock of adamantine assurances, the heavier his load of faith.