Accordingly just as it is better that man should both will good and do it in his external act; so also does it belong to the perfection of moral good, that man should be moved unto good, not only in respect of his will, but also in respect of his sensitive appetite; according to Ps.
 Thomas Aquinas, Summa Theologica (1274). copy citation

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Author Thomas Aquinas
Source Summa Theologica
Topic perfection respect
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

“Hence, since the sensitive appetite can obey reason, as stated above (Q. 17, A. 7) , it belongs to the perfection of moral or human good, that the passions themselves also should be controlled by reason.
Accordingly just as it is better that man should both will good and do it in his external act; so also does it belong to the perfection of moral good, that man should be moved unto good, not only in respect of his will, but also in respect of his sensitive appetite; according to Ps. 83:3: "My heart and my flesh have rejoiced in the living God": where by "heart" we are to understand the intellectual appetite, and by "flesh" the sensitive appetite.
Reply Obj. 1: The passions of the soul may stand in a twofold relation to the judgment of reason.” source