PIETY, n. Reverence for the Supreme Being, based upon His supposed resemblance to man.

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

“Piety,” The Devil’s Dictionary (1911)
    (Source)

See Voltaire.

Originally published in the "Cynic's Word Book" column in the New York American (1905-01-27) and the "Cynic's Dictionary" column in the San Francisco Examiner (1905-02-05).