For the soul is more perfect when joined to the body than when existing apart from it, being an essential part of human nature
 Thomas Aquinas, Summa Theologica (1274). copy citation

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Author Thomas Aquinas
Source Summa Theologica
Topic body soul
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

“_______________________ SECOND ARTICLE [I, Q. 89, Art. 2] Whether the Separated Soul Understands Separate Substances? Objection 1: It would seem that the separated soul does not understand separate substances. For the soul is more perfect when joined to the body than when existing apart from it, being an essential part of human nature; and every part of a whole is more perfect when it exists in that whole. But the soul in the body does not understand separate substances as shown above (Q. 88, A. 1) . Therefore much less is it able to do so when apart from the body.” source