CHRISTIAN, n. One who believes that the New Testament is a divinely inspired book admirably suited to the spiritual needs of his neighbor. One who follows the teachings of Christ in so far as they are not inconsistent with a life of sin.

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

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

Included in The Devil's Dictionary (1911).