Now it behooves one to hold firmly the good of reason against every evil whatsoever, since no bodily good is equivalent to the good of the reason.
 Thomas Aquinas, Summa Theologica (1274). copy citation

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Author Thomas Aquinas
Source Summa Theologica
Topic evil reason
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

“On the contrary, Andronicus says that "fortitude is a virtue of the irascible faculty that is not easily deterred by the fear of death."
I answer that, As stated above (A. 3) , it belongs to the virtue of fortitude to guard the will against being withdrawn from the good of reason through fear of bodily evil. Now it behooves one to hold firmly the good of reason against every evil whatsoever, since no bodily good is equivalent to the good of the reason. Hence fortitude of soul must be that which binds the will firmly to the good of reason in face of the greatest evils: because he that stands firm against great things, will in consequence stand firm against less things, but not conversely.” source