Reply Obj. 1: The inclination of nature in things devoid of reason is without choice: wherefore such an inclination does not of necessity require reason.
 Thomas Aquinas, Summa Theologica (1274). copy citation

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Author Thomas Aquinas
Source Summa Theologica
Topic choice necessity
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

“Consequently just as right reason in speculative matters, in so far as it proceeds from naturally known principles, presupposes the understanding of those principles, so also does prudence, which is the right reason about things to be done.
Reply Obj. 1: The inclination of nature in things devoid of reason is without choice: wherefore such an inclination does not of necessity require reason. But the inclination of moral virtue is with choice: and consequently in order that it may be perfect it requires that reason be perfected by intellectual virtue.
Reply Obj. 2: A man may be virtuous without having full use of reason as to everything, provided he have it with regard to those things which have to be done virtuously.” source