In one of his proofs for the existence of God, Aquinas says, "If that by which it is moved be itself moved, then this also must be moved by another, and that by another again. But this cannot go on to infinity, because then there would be no ..."
A) reliable causal factor.
B) rationality in existence.
C) first mover.
D) metaphysical substance.

Question

Quizplus · Accepted Answer

Aquinas is arguing for the existence of a first mover, who is responsible for the initial motion or cause behind all other movements or causes. He argues that an infinite regress of movers or causes cannot exist, because there would be no explanation for why anything is in motion or caused in the first place. Therefore, he concludes that there must be a first, uncaused cause or unmoved mover, which he identifies as God.

In One of His Proofs for the Existence of God