Now the moral virtues are habits, whereby the powers of appetite are disposed to obey reason promptly. Therefore the gifts of the Holy Ghost are habits whereby man is perfected to obey readily the Holy Ghost.
 Thomas Aquinas, Summa Theologica (1274). copy citation

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Author Thomas Aquinas
Source Summa Theologica
Topic virtue power
Date 1274
Language English
Reference
Note Translated by Fathers of the English Dominican Province
Weblink http://www.gutenberg.org/cache/epub/17897/pg17897-images.html

Context

“Now it is evident from what has been already said (Q. 56, A. 4; Q. 58, A. 2) , that the moral virtues perfect the appetitive power according as it partakes somewhat of the reason, in so far, to wit, as it has a natural aptitude to be moved by the command of reason. Accordingly the gifts of the Holy Ghost, as compared with the Holy Ghost Himself, are related to man, even as the moral virtues, in comparison with the reason, are related to the appetitive power. Now the moral virtues are habits, whereby the powers of appetite are disposed to obey reason promptly. Therefore the gifts of the Holy Ghost are habits whereby man is perfected to obey readily the Holy Ghost. Reply Obj. 1: Gregory solves this objection (Moral. ii, 27) by saying that "by those gifts without which one cannot obtain life, the Holy Ghost ever abides in all the elect, but not by His other gifts." Now the seven gifts are necessary for salvation, as stated above (A.” source