But pleasure is made better by addition; since pleasure together with virtue is better than pleasure without virtue. Therefore pleasure is not the greatest good.
 Thomas Aquinas, Summa Theologica (1274). copy citation

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Author Thomas Aquinas
Source Summa Theologica
Topic virtue pleasure
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

“But pleasure is a consequence of generation: for the fact that a thing takes pleasure is due to its being established in its own nature, as stated above (Q. 31, A. 1). Therefore no pleasure is the greatest good.
Obj. 2: Further, that which is the greatest good cannot be made better by addition. But pleasure is made better by addition; since pleasure together with virtue is better than pleasure without virtue. Therefore pleasure is not the greatest good. Obj. 3: Further, that which is the greatest good is universally good, as being good of itself: since that which is such of itself is prior to and greater than that which is such accidentally. But pleasure is not universally good, as stated above (A. 2).” source