Objection 3: Further, an effect is kept in being by the cause, not only of its "becoming," but also of its being. But all created causes do not seem to cause their effects except in their "becoming," for they cause only by moving, as above stated (Q[45], A[3]). Therefore they do not cause so as to keep their effects in being.
On the contrary, A thing is kept in being by that which gives it being. But God gives being by means of certain intermediate causes. Therefore He also keeps things in being by means of certain causes.
I answer that, As stated above (A[1]), a thing keeps another in being in two ways; first, indirectly and accidentally, by removing or hindering the action of a corrupting cause; secondly, directly and "per se," by the fact that that on it depends the other's being, as the being of the effect depends on the cause. 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. Therefore the first cause is the principal cause of the preservation of the effect which is to be referred to the middle causes in a secondary way; and all the more so, as the middle cause is higher and nearer to the first cause.
For this reason, even in things corporeal, the preservation and continuation of things is ascribed to the higher causes: thus the Philosopher says (Metaph. xii, Did. xi, 6), that the first, namely the diurnal movement is the cause of the continuation of things generated; whereas the second movement, which is from the zodiac, is the cause of diversity owing to generation and corruption. In like manner astrologers ascribe to Saturn, the highest of the planets, those things which are permanent and fixed. So we conclude that God keeps certain things in being, by means of certain causes.
Reply to Objection 1: God created all things immediately, but in the creation itself He established an order among things, so that some depend on others, by which they are preserved in being, though He remains the principal cause of their preservation.
Reply to Objection 2: Since an effect is preserved by its proper cause on which it depends; just as no effect can be its own cause, but can only produce another effect, so no effect can be endowed with the power of self-preservation, but only with the power of preserving another.
Reply to Objection 3: No created nature can be the cause of another, as regards the latter acquiring a new form, or disposition, except by virtue of some change; for the created nature acts always on something presupposed. But after causing the form or disposition in the effect, without any fresh change in the effect, the cause preserves that form or disposition; as in the air, when it is lit up anew, we must allow some change to have taken place, while the preservation of the light is without any further change in the air due to the presence of the source of light.
Whether God can annihilate anything?
Objection 1: It would seem that God cannot annihilate anything. For Augustine says (QQ. 83, qu. 21) that "God is not the cause of anything tending to non-existence." But He would be such a cause if He were to annihilate anything. Therefore He cannot annihilate anything.
Objection 2: Further, by His goodness God is the cause why things exist, since, as Augustine says (De Doctr. Christ. i, 32): "Because God is good, we exist." But God cannot cease to be good. Therefore He cannot cause things to cease to exist; which would be the case were He to annihilate anything.
Objection 3: Further, if God were to annihilate anything it would be by His action. But this cannot be; because the term of every action is existence. Hence even the action of a corrupting cause has its term in something generated; for when one thing is generated another undergoes corruption. Therefore God cannot annihilate anything.
On the contrary, It is written ( Jer. 10:24 ): "Correct me, O Lord, but yet with judgment; and not in Thy fury, lest Thou bring me to nothing."
I answer that, Some have held that God, in giving existence to creatures, acted from natural necessity. Were this true, God could not annihilate anything, since His nature cannot change. But, as we have said above (Q[19], A[4]), such an opinion is entirely false, and absolutely contrary to the Catholic faith, which confesses that God created things of His own free-will, according to Ps. 134:6 : "Whatsoever the Lord pleased, He hath done." 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; so after they are made, He is free not to continue their existence; and thus they would cease to exist; and this would be to annihilate them.
Reply to Objection 1: 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.
Reply to Objection 2: God's goodness is the cause of things, not as though by natural necessity, because the Divine goodness does not depend on creatures; but by His free-will. Wherefore, as without prejudice to His goodness, He might not have produced things into existence, so, without prejudice to His goodness, He might not preserve things in existence.
Reply to Objection 3: If God were to annihilate anything, this would not imply an action on God's part; but a mere cessation of His action.
Whether anything is annihilated?
Objection 1: It would seem that something is annihilated. For the end corresponds to the beginning. But in the beginning there was nothing but God. 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; and so at some time it will be reduced to nothing.
Objection 3: Further, forms and accidents have no matter as part of themselves. But at some time they cease to exist. Therefore they are reduced to nothing.
On the contrary, It is written ( Eccles. 3:14 ): "I have learned that all the works that God hath made continue for ever."
I answer that, Some of those things which God does in creatures occur in accordance with the natural course of things; others happen miraculously, and not in accordance with the natural order, as will be explained (Q[105], A[6]). Now whatever God wills to do according to the natural order of things may be observed from their nature; but those things which occur miraculously, are ordered for the manifestation of grace, according to the Apostle, "To each one is given the manifestation of the Spirit, unto profit" ( 1 Cor. 12:7 ); and subsequently he mentions, among others, the working of miracles.
Now the nature of creatures shows that none of them is annihilated. 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.
Reply to Objection 1: That things are brought into existence from a state of non-existence, clearly shows the power of Him Who made them; but that they should be reduced to nothing would hinder that manifestation, since the power of God is conspicuously shown in His preserving all things in existence, according to the Apostle: "Upholding all things by the word of His power" ( Heb. 1:3 ).
Reply to Objection 2: 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. So things which have no contrary, although they have a finite power, continue to exist for ever.