There are things that are acted upon, but do not act; such are bodies: there is one Who acts but is not acted upon
 Thomas Aquinas, Summa Theologica (1274). copy citation

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Author Thomas Aquinas
Source Summa Theologica
Topic body acts
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

“Whether the heavenly bodies impose necessity on those things which are subject to their influence? _______________________ FIRST ARTICLE [I, Q. 115, Art. 1] Whether a Body Can Be Active? Objection 1: It would seem that no bodies are active. For Augustine says (De Civ. Dei v, 9) : "There are things that are acted upon, but do not act; such are bodies: there is one Who acts but is not acted upon; this is God: there are things that both act and are acted upon; these are the spiritual substances." Obj. 2: Further, every agent except the first agent requires in its work a subject susceptible of its action.” source