because charity is above nature, while wickedness is against nature.
 Thomas Aquinas, Summa Theologica (1274). copy citation

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Author Thomas Aquinas
Source Summa Theologica
Topic wickedness charity
Date 1274
Language English
Reference
Note Translated by Fathers of the English Dominican Province
Weblink http://www.gutenberg.org/cache/epub/17611/pg17611-images.html

Context

“Consequently there is no natural love in them. Obj. 3: Further, every love is either ordinate or inordinate. Now ordinate love belongs to charity; while inordinate love belongs to wickedness. But neither of these belongs to nature; because charity is above nature, while wickedness is against nature. Therefore there is no natural love in the angels. On the contrary, Love results from knowledge; for, nothing is loved except it be first known, as Augustine says (De Trin. x, 1,2) . But there is natural knowledge in the angels.” source