For life and soundness of body depend on the body being subject to the soul, as the perfectible is subject to its perfection.
 Thomas Aquinas, Summa Theologica (1274). copy citation

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Author Thomas Aquinas
Source Summa Theologica
Topic perfection life
Date 1274
Language English
Reference
Note Translated by Fathers of the English Dominican Province
Weblink http://www.gutenberg.org/cache/epub/18755/pg18755-images.html

Context

“But inasmuch as through sin man's mind withdrew from subjection to God, the result was that neither were his lower powers wholly subject to his reason, whence there followed so great a rebellion of the carnal appetite against the reason: nor was the body wholly subject to the soul; whence arose death and other bodily defects. For life and soundness of body depend on the body being subject to the soul, as the perfectible is subject to its perfection. Consequently, on the other hand, death, sickness, and all defects of the body are due to the lack of the body's subjection to the soul. It is therefore evident that as the rebellion of the carnal appetite against the spirit is a punishment of our first parents' sin, so also are death and all defects of the body.” source