Hence it follows that a virtue's superiority and preponderance over other virtues is the greater according as it inclines man to good more effectively and directly.
 Thomas Aquinas, Summa Theologica (1274). copy citation

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Author Thomas Aquinas
Source Summa Theologica
Topic virtue superiority
Date 1274
Language English
Reference
Note Translated by Fathers of the English Dominican Province
Weblink http://www.gutenberg.org/cache/epub/18755/pg18755-images.html

Context

“On the contrary, It is not reckoned among the four virtues which Gregory (Moral. xxii) and Augustine (De Morib. Eccl. xv) call principal.
I answer that, Virtues by their very nature are directed to good. For it is virtue that "makes its possessor good, and renders the latter's work good" (Ethic. ii, 6) . Hence it follows that a virtue's superiority and preponderance over other virtues is the greater according as it inclines man to good more effectively and directly. Now those virtues which are effective of good, incline a man more directly to good than those which are a check on the things which lead man away from good: and just as among those that are effective of good, the greater is that which establishes man in a greater good (thus faith, hope, and charity are greater than prudence and justice) ; so too among those that are a check on things that withdraw man from good, the greater virtue is the one which is a check on a greater obstacle to good.” source