c. About the Third Contrary Reason and its Solution

379. As to the third response [n.348], which agrees with the third reason he adduces for himself as far as this conclusion is concerned, namely [n.343] that it is not of the essence of motion that some subject be differently disposed according to it - I do not argue against it because I believe the conclusion in itself to be true. But as to the issue at hand (because he concedes that, because of it, motion itself without a subject can be from a created agent [n.346]) I argue as follows: a created agent cannot make an accident in settled being without a subject; therefore, by similarity or a fortiori, it cannot cause an accident in flux without a subject.