Summa Theologiae · I, q. 114
Question 114. Of the Assaults of the Demons
Thomas Aquinas, Summa Theologiae, First Part. 5 articles.
Text: Summa Theologiae, Project Gutenberg #17611, First Part (Prima Pars), translated by the Fathers of the English Dominican Province. The First Part of the Summa in the English Dominican translation (first printed 1911 to 1925; second and revised edition from 1920). A sample check on 2026-11-09 against pre-1931 printings at the Internet Archive (first printings of 1915 and 1916 and the second and revised edition of the 1920s) found that the article text matches, with no 1947 introduction, synopsis, or index. The phrase “From the Complete American Edition” in Gutenberg's catalog title is a provenance note only. Question and article numbers were added by the transcriber. Rights: Public domain (US)
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We now consider the assaults of the demons. Under this head there are five points of inquiry:
(1) Whether men are assailed by the demons?
(2) Whether to tempt is proper to the devil?
(3) Whether all the sins of men are to be set down to the assaults or temptations of the demons?
(4) Whether they can work real miracles for the purpose of leading men astray?
(5) Whether the demons who are overcome by men, are hindered from making further assaults?