But beauty of soul is a quality, even as beauty of body. Therefore grace is a quality.
 Thomas Aquinas, Summa Theologica (1274). copy citation

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Author Thomas Aquinas
Source Summa Theologica
Topic beauty quality
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 grace remains; since it is not corrupted, for thus it would be reduced to nothing, since it was created from nothing; hence it is called a "new creature" (Gal. 6:15) .
On the contrary, on Ps. 103:15: "That he may make the face cheerful with oil"; the gloss says: "Grace is a certain beauty of soul, which wins the Divine love." But beauty of soul is a quality, even as beauty of body. Therefore grace is a quality. I answer that, As stated above (A. 1) , there is understood to be an effect of God's gratuitous will in whoever is said to have God's grace. Now it was stated (Q. 109, A. 1) that man is aided by God's gratuitous will in two ways: first, inasmuch as man's soul is moved by God to know or will or do something, and in this way the gratuitous effect in man is not a quality, but a movement of the soul; for "motion is the act of the mover in the moved."” source