Where knowledge of the truth is lacking, virtue is a mockery even in the best behaved people.
 Thomas Aquinas, Summa Theologica (1274). copy citation

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Author Thomas Aquinas
Source Summa Theologica
Topic mockery virtue
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

“Because a gloss of Augustine [*Cf. Lib. Sentent. Prosperi cvi.] commenting on Rom. 14:23, "All that is not of faith is sin," says: "The whole life of an unbeliever is a sin: and there is no good without the Sovereign Good. Where knowledge of the truth is lacking, virtue is a mockery even in the best behaved people." Now faith cannot be acquired by means of works, but is caused in us by God, according to Eph. 2:8: "By grace you are saved through faith." Therefore no acquired virtue can be in us by habituation. Obj.” source