Find accurate definitions of over 5,000 Catholic terms and phrases (including abbreviations). Based on Fr. John Hardon's Modern Catholic Dictionary, © Eternal Life. Used with permission.
The theory that accepts the existence of God on purely rational grounds but denies (with Blount or Tindal) or doubts (with Hume) or rejects as incredible (with Voltaire and Rousseau) Christianity as a supernatural religion. Accordingly revelation, miracles, grace, and mysteries are excluded from acceptance by what is called "the rational man." Yet deism differs from rationalism in stressing its acceptance of a personal God and adherence to what is called natural religion, but with no recognition of a supernatural order. (Etym. Latin Deus, God.)