Thomas Aquinas

“ For, either they are immaterial, and therefore have no potentiality to non-existence; or they are material, and then they continue to exist, at least in matter, which is incorruptible, since it is the subject of generation and corruption. Moreover, the annihilation of things does not pertain to the manifestation of grace; since rather the power and goodness of God are manifested by the preservation of things in existence. Wherefore we must conclude by denying absolutely that anything at all will be annihilated. ”

“ Further, God is more powerful than any created agent. But a created agent, even after ceasing to act, can cause its effect to be preserved in being; thus the house continues to stand after the builder has ceased to build; and water remains hot for some time after the fire has ceased to heat. Much more, therefore, can God cause His creature to be kept in being, after He has ceased to create it. ”

“ Non-existence has no direct cause; for nothing is a cause except inasmuch as it has existence, and a being essentially as such is a cause of something existing. Therefore God cannot cause a thing to tend to non-existence, whereas a creature has this tendency of itself, since it is produced from nothing. But indirectly God can be the cause of things being reduced to non-existence, by withdrawing His action therefrom. ”

“ Therefore that God gives existence to a creature depends on His will; nor does He preserve things in existence otherwise than by continually pouring out existence into them, as we have said. Therefore, just as before things existed, God was free not to give them existence, and not to make them ”

“ Wherefore if it were to be reduced to the perfect form of fire, it would retain that form always; whereas if it has the form of fire imperfectly and inchoately, the heat will remain for a time only, by reason of the imperfect participation of the principle of heat. On the other hand, air is not of such a nature as to receive light in the same way as it exists in the sun, which is the principle of light. ”

“ A creature's potentiality to existence is merely receptive; the active power belongs to God Himself, from Whom existence is derived. Wherefore the infinite duration of things is a consequence of the infinity of the Divine power. To some things, however, is given a determinate power of duration for a certain time, so far as they may be hindered by some contrary agent from receiving the influx of existence which comes from Him Whom finite power cannot resist, for an infinite, but only for a fixed time. ”

“ And in both ways a created thing keeps another in being. For it is clear that even in corporeal things there are many causes which hinder the action of corrupting agents, and for that reason are called preservatives; just as salt preserves meat from putrefaction; and in like manner with many other things. It happens also that an effect depends on a creature as to its being. For when we have a series of causes depending on one another, it necessarily follows that, while the effect depends first and principally on the first cause, it also depends in a secondary way on all the middle causes. ”

“ So things which have no contrary, although they have a finite power, continue to exist for ever.
Reply to Objection 3: Forms and accidents are not complete beings, since they do not subsist: but each one of them is something "of a being"; for it is called a being, because something is by it. Yet so far as their mode of existence is concerned, they are not entirely reduced to nothingness; not that any part of them survives, but that they remain in the potentiality of the matter, or of the subject. ”

“ Now it is clear that of two things in the same species one cannot directly cause the other's form as such, since it would then be the cause of its own form, which is essentially the same as the form of the other ”

“ Therefore such creatures as these have in their nature to be necessarily, and cannot not-be; for there can be no potentiality to not-being, either in the form which has being of itself, or in matter existing under a form which it cannot lose, since it is not in potentiality to any other form. ”

“ Objection 3: Further, nothing violent can occur, except there be some active cause thereof. But tendency to not-being is unnatural and violent to any creature, since all creatures naturally desire to be. ”

“ Therefore all things must tend to this end, that there shall be nothing but God. Therefore creatures will be reduced to nothing.
Objection 2: Further, every creature has a finite power. But no finite power extends to the infinite. Wherefore the Philosopher proves (Phys. viii, 10) that, "a finite power cannot move in infinite time." Therefore a creature cannot last for an infinite duration ”