Article 17
In the seventeenth article, the question is raised whether the divinity in Christ performed miracles as a principle cause while his humanity performed these miracles in a subordinate way.
It should be said that this is true because the divinity of Christ was working by means of the humanity as by an instrument, as Damascene says. Now the notion of an instrument and of a subordinate is the same in actions because both move inasmuch as they are moved by another.
Chapter 18 of 37