Summa Theologica Part I (Prima Pars) Part 76

But it is better for there to be many worlds than one, because many good things are better than a few. Therefore many worlds have been made by G.o.d.

Obj. 3: Further, everything which has a form in matter can be multiplied in number, the species remaining the same, because multiplication in number comes from matter. But the world has a form in matter. Thus as when I say "man" I mean the form, and when I say "this man," I mean the form in matter; so when we say "world," the form is signified, and when we say "this world," the form in the matter is signified. Therefore there is nothing to prevent the existence of many worlds.

_On the contrary,_ It is said (John 1:10): "The world was made by Him," where the world is named as one, as if only one existed.

_I answer that,_ The very order of things created by G.o.d shows the unity of the world. For this world is called one by the unity of order, whereby some things are ordered to others. But whatever things come from G.o.d, have relation of order to each other, and to G.o.d Himself, as shown above (Q. 11, A. 3; Q. 21, A. 1). Hence it must be that all things should belong to one world. Therefore those only can a.s.sert that many worlds exist who do not acknowledge any ordaining wisdom, but rather believe in chance, as Democritus, who said that this world, besides an infinite number of other worlds, was made from a casual concourse of atoms.

Reply Obj. 1: This reason proves that the world is one because all things must be arranged in one order, and to one end. Therefore from the unity of order in things Aristotle infers (Metaph. xii, text 52) the unity of G.o.d governing all; and Plato (Tim.), from the unity of the exemplar, proves the unity of the world, as the thing designed.

Reply Obj. 2: No agent intends material plurality as the end forasmuch as material mult.i.tude has no certain limit, but of itself tends to infinity, and the infinite is opposed to the notion of end.

Now when it is said that many worlds are better than one, this has reference to material order. But the best in this sense is not the intention of the divine agent; forasmuch as for the same reason it might be said that if He had made two worlds, it would be better if He had made three; and so on to infinite.

Reply Obj. 3: The world is composed of the whole of its matter. For it is not possible for there to be another earth than this one, since every earth would naturally be carried to this central one, wherever it was. The same applies to the other bodies which are part of the world.

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QUESTION 48

THE DISTINCTION OF THINGS IN PARTICULAR (In Six Articles)

We must now consider the distinction of things in particular; and firstly the distinction of good and evil; and then the distinction of the spiritual and corporeal creatures.

Concerning the first, we inquire into evil and its cause.

Concerning evil, six points are to be considered:

(1) Whether evil is a nature?

(2) Whether evil is found in things?

(3) Whether good is the subject of evil?

(4) Whether evil totally corrupts good?

(5) The division of evil into pain and fault.

(6) Whether pain, or fault, has more the nature of evil?

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FIRST ARTICLE [I, Q. 48, Art. 1]

Whether Evil Is a Nature?

Objection 1: It would seem that evil is a nature. For every genus is a nature. But evil is a genus; for the Philosopher says (Praedic. x) that "good and evil are not in a genus, but are genera of other things." Therefore evil is a nature.

Obj. 2: Further, every difference which const.i.tutes a species is a nature. But evil is a difference const.i.tuting a species of morality; for a bad habit differs in species from a good habit, as liberality from illiberality. Therefore evil signifies a nature.

Obj. 3: Further, each extreme of two contraries is a nature. But evil and good are not opposed as privation and habit, but as contraries, as the Philosopher shows (Praedic. x) by the fact that between good and evil there is a medium, and from evil there can be a return to good. Therefore evil signifies a nature.

Obj. 4: Further, what is not, acts not. But evil acts, for it corrupts good. Therefore evil is a being and a nature.

Obj. 5: Further, nothing belongs to the perfection of the universe except what is a being and a nature. But evil belongs to the perfection of the universe of things; for Augustine says (Enchir.

10, 11) that the "admirable beauty of the universe is made up of all things. In which even what is called evil, well ordered and in its place, is the eminent commendation of what is good." Therefore evil is a nature.

_On the contrary,_ Dionysius says (Div. Nom. iv), "Evil is neither a being nor a good."

_I answer that,_ One opposite is known through the other, as darkness is known through light. Hence also what evil is must be known from the nature of good. Now, we have said above that good is everything appetible; and thus, since every nature desires its own being and its own perfection, it must be said also that the being and the perfection of any nature is good. Hence it cannot be that evil signifies being, or any form or nature. Therefore it must be that by the name of evil is signified the absence of good. And this is what is meant by saying that "evil is neither a being nor a good." For since being, as such, is good, the absence of one implies the absence of the other.

Reply Obj. 1: Aristotle speaks there according to the opinion of Pythagoreans, who thought that evil was a kind of nature; and therefore they a.s.serted the existence of the genus of good and evil.

For Aristotle, especially in his logical works, brings forward examples that in his time were probable in the opinion of some philosophers. Or, it may be said that, as the Philosopher says (Metaph. iv, text 6), "the first kind of contrariety is habit and privation," as being verified in all contraries; since one contrary is always imperfect in relation to another, as black in relation to white, and bitter in relation to sweet. And in this way good and evil are said to be genera not simply, but in regard to contraries; because, as every form has the nature of good, so every privation, as such, has the nature of evil.

Reply Obj. 2: Good and evil are not const.i.tutive differences except in morals, which receive their species from the end, which is the object of the will, the source of all morality. And because good has the nature of an end, therefore good and evil are specific differences in moral things; good in itself, but evil as the absence of the due end. Yet neither does the absence of the due end by itself const.i.tute a moral species, except as it is joined to the undue end; just as we do not find the privation of the substantial form in natural things, unless it is joined to another form. Thus, therefore, the evil which is a const.i.tutive difference in morals is a certain good joined to the privation of another good; as the end proposed by the intemperate man is not the privation of the good of reason, but the delight of sense without the order of reason. Hence evil is not a const.i.tutive difference as such, but by reason of the good that is annexed.

Reply Obj. 3: This appears from the above. For the Philosopher speaks there of good and evil in morality. Because in that respect, between good and evil there is a medium, as good is considered as something rightly ordered, and evil as a thing not only out of right order, but also as injurious to another. Hence the Philosopher says (Ethic. iv, i) that a "prodigal man is foolish, but not evil." And from this evil in morality, there may be a return to good, but not from any sort of evil, for from blindness there is no return to sight, although blindness is an evil.

Reply Obj. 4: A thing is said to act in a threefold sense. In one way, formally, as when we say that whiteness makes white; and in that sense evil considered even as a privation is said to corrupt good, forasmuch as it is itself a corruption or privation of good. In another sense a thing is said to act effectively, as when a painter makes a wall white. Thirdly, it is said in the sense of the final cause, as the end is said to effect by moving the efficient cause.

But in these two ways evil does not effect anything of itself, that is, as a privation, but by virtue of the good annexed to it. For every action comes from some form; and everything which is desired as an end, is a perfection. And therefore, as Dionysius says (Div. Nom.

iv): "Evil does not act, nor is it desired, except by virtue of some good joined to it: while of itself it is nothing definite, and beside the scope of our will and intention."

Reply Obj. 5: As was said above, the parts of the universe are ordered to each other, according as one acts on the other, and according as one is the end and exemplar of the other. But, as was said above, this can only happen to evil as joined to some good.

Hence evil neither belongs to the perfection of the universe, nor does it come under the order of the same, except accidentally, that is, by reason of some good joined to it.

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SECOND ARTICLE [I, Q. 48, Art. 2]

Whether Evil Is Found in Things?

Objection 1: It would seem that evil is not found in things. For whatever is found in things, is either something, or a privation of something, that is a "not-being." But Dionysius says (Div. Nom. iv) that "evil is distant from existence, and even more distant from non-existence." Therefore evil is not at all found in things.

Obj. 2: Further, "being" and "thing" are convertible. If therefore evil is a being in things, it follows that evil is a thing, which is contrary to what has been said (A. 1).

Obj. 3: Further, "the white unmixed with black is the most white," as the Philosopher says (Topic. iii, 4). Therefore also the good unmixed with evil is the greater good. But G.o.d makes always what is best, much more than nature does. Therefore in things made by G.o.d there is no evil.

_On the contrary,_ On the above a.s.sumptions, all prohibitions and penalties would cease, for they exist only for evils.

_I answer that,_ As was said above (Q. 47, AA. 1, 2), the perfection of the universe requires that there should be inequality in things, so that every grade of goodness may be realized. Now, one grade of goodness is that of the good which cannot fail. Another grade of goodness is that of the good which can fail in goodness, and this grade is to be found in existence itself; for some things there are which cannot lose their existence as incorruptible things, while some there are which can lose it, as things corruptible.

As, therefore, the perfection of the universe requires that there should be not only beings incorruptible, but also corruptible beings; so the perfection of the universe requires that there should be some which can fail in goodness, and thence it follows that sometimes they do fail. Now it is in this that evil consists, namely, in the fact that a thing fails in goodness. Hence it is clear that evil is found in things, as corruption also is found; for corruption is itself an evil.

Reply Obj. 1: Evil is distant both from simple being and from simple "not-being," because it is neither a habit nor a pure negation, but a privation.

Reply Obj. 2: As the Philosopher says (Metaph. v, text 14), being is twofold. In one way it is considered as signifying the ent.i.ty of a thing, as divisible by the ten "predicaments"; and in that sense it is convertible with thing, and thus no privation is a being, and neither therefore is evil a being. In another sense being conveys the truth of a proposition which unites together subject and attribute by a copula, notified by this word "is"; and in this sense being is what answers to the question, "Does it exist?" and thus we speak of blindness as being in the eye; or of any other privation. In this way even evil can be called a being. Through ignorance of this distinction some, considering that things may be evil, or that evil is said to be in things, believed that evil was a positive thing in itself.

Reply Obj. 3: G.o.d and nature and any other agent make what is best in the whole, but not what is best in every single part, except in order to the whole, as was said above (Q. 47, A. 2). And the whole itself, which is the universe of creatures, is all the better and more perfect if some things in it can fail in goodness, and do sometimes fail, G.o.d not preventing this. This happens, firstly, because "it belongs to Providence not to destroy, but to save nature," as Dionysius says (Div. Nom. iv); but it belongs to nature that what may fail should sometimes fail; secondly, because, as Augustine says (Enchir. 11), "G.o.d is so powerful that He can even make good out of evil." Hence many good things would be taken away if G.o.d permitted no evil to exist; for fire would not be generated if air was not corrupted, nor would the life of a lion be preserved unless the a.s.s were killed. Neither would avenging justice nor the patience of a sufferer be praised if there were no injustice.

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THIRD ARTICLE [I, Q. 48, Art. 3]

Whether Evil Is in Good As in Its Subject?