FAITH, n. Belief without evidence in what is told by one who speaks without knowledge of things without parallel.

Ambrose Bierce (1842–1914?) American writer and journalist

“Faith,” The Cynic’s Word Book (1906)
    (Source)

Included in The Devil's Dictionary (1911). Originally published in the "Devil's Dictionary" column in the San Francisco Wasp (1884-06-07).