Proofs 5-8: modes of change; independence; potency; first mover
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FIFTH, from an induction of the modes by which an intelligent nature can be changed: as to existence; as to accidents; as to knowledge; as to decree or purpose of will.But by none of these modes is God changed.SIXTH, from independence.Whoever is independent is plainly immutable in Himself.But God is independent, as was proved in chapter V.
SEVENTH, from the state of a being in potency.Whatever is mutable is somehow in potency.But God is in no way in potency.Pure act, indeed the purest, is God alone.EIGHTH, from the nature of motion.That from which every motion and change is, is simply immobile and immutable, as Augustine and Boethius assert from Aristotle.But from God is every motion and change.
Latin
QUINTO, ab inductione modorum, quibus natura intelligens mutari potest: quod ad existentiam; ad accidentia; ad cognitionem; ad decretum sive propositum voluntatis. Atqui nullo horum modorum Deus mutatur. SEXTO, ab independentia. Qui est independens, is in se plane immutabilis est. Atqui Deus est independens, ut probatum est cap. V. SEPTIMO, a statu entis in potentia. Quicquid est mutabile, id aliquo modo in potentia est. Atqui Deus nullo modo in potentia est. Actus purus, imo purissimus, solus Deus est. OCTAVO, a natura motus. A quo omnis motus et mutatio est, id est simpliciter immobile atque immutabile, ut Augustinus et Boethius ex Aristotele asserunt. Atqui a Deo est omnis motus ac mutatio.