(2) Bonum alteri.—Even, however, if it were granted that the actual existence of some beings is not good for themselves, might it not nevertheless be good for other beings, and in relation to the general scheme of things? Is there not an intelligible sense in which every actual being is bonum alteri, good for other things? Here again the same experience of actual reality, which teaches us that each individual being has a nature whereby it tends to its own good as a particular end, also teaches us that in the general scheme of reality things are helpful to one another, nay, are intended by their interaction and co-operation with one another to subserve the wider end which is the good of the whole system of reality. There is little use in puzzling, as people sometimes do, over the raison d'être of individual things or classes of things in human experience, over the good or the evil of the existence of these things, over the question whether or [pg 181] not it would be better that these things should never have existed, until we have consulted not any isolated portion of human experience but this experience as a whole. In this we can find sufficient evidence for the prevalence of a beneficent purpose everywhere. Not that we can read this purpose in every detail of reality. Even when we have convinced ourselves that all creation is the work of a Supreme Being who is Infinite Goodness Itself, we cannot gain that full insight into the secret designs of His Providence, which would be needed in order to “justify His ways” in all things. But when we have convinced ourselves that the created universe exists because God wills it, we can understand that every actual reality in it must be “good,” as being an object or term of the Divine Will. Every created reality is thus bonum alteri inasmuch as it is good for God, not, of course, in the impossible sense of perfecting Him, but as an imitation and expression of the Goodness of the Divine Nature Itself. The experience which enables us to reach a knowledge of the existence and nature of God, the Creator, Conserver, and Providence of the actual universe, also teaches us that this universe can have no other ultimate end or good than God Himself, i.e. God's will to manifest His goodness by the extrinsic glory which consists in the knowledge and love of Him by His rational creatures. The omnipotence of the Creator, His freedom in creating, and our knowledge of the universe He has actually chosen to create from among indefinite possible worlds, all alike convince us that the actual world is neither the best possible nor the worst possible, absolutely speaking. But our knowledge of His wisdom and power also convinces us that for the purpose of manifesting His glory in the measure and degree in which He has actually chosen to manifest it by creating the existing universe, and relatively to the attainment of this specific purpose, the existing universe is the best possible.
51. Optimism and Pessimism.—Those few outlines of the philosophy of theism—theses established in Natural Theology—will reveal to us the place of theism in relation to “optimist” and “pessimist” systems of philosophy. Pessimism, as an outcome of philosophical speculation, is the proclamation in some form or other of the conviction that human existence, nay, existence in general, is a failure, an evil. It is the analogue, in relation to will, of what scepticism is in relation to intellect; and it is no less self-contradictory than the latter. While the latter [pg 182] points to total paralysis of thought, the former involves a like paralysis of all will, all effort, all purpose in existence—a philosophy of despair, despondency, gloom. Both are equally erroneous, equally indicative of philosophical failure, equally repugnant to the normal, healthy mind. Optimism on the other hand is expressive of the conviction that good predominates in all existence: melius est esse quam non esse; that at the root of all reality there is a beneficent purpose which is ever being realized; that there is in things not merely a truth that can be known but a goodness that can be loved. Existence is not an evil, life is not a failure. This is a philosophy of hope, buoyancy, effort and attainment. But is it true, or is it an empty illusion? Well, to maintain that the actual universe is the best absolutely, would, of course, be absurd. If Leibniz's “Principle of Sufficient Reason” obliged him to contend, in face of the painfully palpable facts of physical and moral evil in the universe, that this universe is the best absolutely possible, the best that God could create, we can only say: so much the worse for his “Principle”. The true optimism is that of the theist who, admitting the prevalence of evil in the universe, in the sense to be explained presently, at the same time holds that throughout creation the good predominates, that God's beneficent purpose in regard to individuals does in the main prevail, and that His glory is manifested in giving to rational creatures the perfection and felicity of knowing and loving Himself. For the theist, then, the problem of the existence of evil in the universe assumes the general form of reconciling the fact of evil in God's creation with the fact of God's infinite power and goodness. This is a problem for Natural Theology. Here we have merely to indicate some general principles arising from the consideration of evil as the correlative and antithesis of goodness.
52. Evil: its Nature and Causes. Manicheism.—Admitting the existence of evil in the universe, the scholastic apparently withdraws the admission forthwith by denying the reality of evil. The paradox explains itself by comparing the notions of good and evil, and thus trying to arrive at a proper conception of the latter.
If ontological goodness is really identical with actual being, if being is good in so far as it is actual, then it would appear that ontological evil must be identical with non-being, nothingness. And so it is, in the sense that no evil is a positive, actual reality, that all evil is an absence of reality. But just as the good, though [pg 183] really identical with the actual, is nevertheless logically distinct from the latter, so is evil logically distinct from nothingness, or the absence of reality. As we have seen, the good is that which perfects a nature, that which is due to a nature as the realization of the end of the latter. So, too, is evil the privation of any perfection due to a nature, the absence of something positive and something which ought to be present. Evil, therefore, is not a mere negation or absence of being; it is the absence of a good, or in other words the absence of a reality that should be present. All privation is negation, but not vice versa; for privation is the negation of something due: the absence of virtue is a mere negation in an animal, in man it is a privation. Hence the commonly accepted definition of evil: Malum est privatio boni debiti: Evil is the privation of the goodness due to a thing.[187] Evil is always, therefore, a defect, a deficiency. The notion of evil is a relative, not an absolute notion. As goodness is the right relation of a nature to its proper end, so is evil a failure, a defect in this relation: Malum est privatio ordinis ad finem debitum.[188]
The very finiteness of a finite being is the absence of further reality in this being; but as this further reality is not due to such a being, its absence, which has sometimes been improperly described as “metaphysical evil,” is not rightly regarded as evil at all: except, indeed, we were to conceive it as happening to the Infinite Being Himself, which would be a contradiction in thought.
Evil, then, in its formal concept is nothing positive; it is essentially negative, or rather privative. For this very reason, when we consider evil in the concrete, i.e. as affecting actual things, as occurring in the actual universe—we can scarcely speak of it with propriety as “existing,”—we see that it essentially involves some positive, real subject which it affects, some nature which, by affecting, it renders so far evil. Cancer in the stomach is a real evil of the stomach, a defect, a deficiency, a failure, in the adaptation of the stomach to its proper end. It is not itself a positive, absolute, evil entity. In so far as it is itself a positive, physical reality, a growth of living cells, it has its own nature, its natural tendency, its development towards an end in accordance with biological laws: in all of which it verifies the definition of ontological goodness. But the existence of such a [pg 184] growth in the stomach is pathological, i.e. a disease of the stomach, a prevention of the natural, normal function of the stomach, a failure of the latter's adaptation to its end, and hence an evil for the stomach. Lying, too, is an evil, a moral evil of man as a moral subject. But this does not mean that the whole physical process of thinking, judging, speaking, whereby a man lies, is itself a positive evil entity. The thinking is itself good as a physical act. So is the speaking in itself good as a physical act. Whatever of positive reality there is in the whole process is good, ontologically good. But there is a want of conformity of the language with the thought, entailing a privation or failure of adaptation of the man as a moral subject with his end, with his real good; and in this failure of adaptation, this privation of goodness, lies the moral evil of lying.
Evil, then, has a material or subjective cause, viz. some positive, actual reality, which is good in so far forth as it is actual, but which is evil, or wanting in something due to it, in so far as the privation which we have called evil affects it.
But evil has no formal cause: formally it is not a reality but a privation: “evil has no formal cause, but is rather the privation of a form”.[189]
Nor has evil any final cause, for it consists precisely in the failure of a being's natural tendency towards its end, in the want of adaptation of a nature to its end: “nor has evil a final cause, but is rather the privation of a being's due relation to its natural end”.[190] Evil cannot be the natural result of a being's tendency towards its end, or a means to the attainment of this end. For that which is really an end must be good, and a means derives its goodness from the end to which it is a means. The good, because it is an end, or a means to an end, is desirable; and so, too, might evil be defined a posteriori as that which is the object of no natural tendency or desire, that from which all things are averse: malum est quod nullum ens appetit, vel a quo omnia aversantur. Nor can evil be itself an end, or be as such desired or desirable. Real evil is no doubt often sought and desired by conscious beings, sometimes physical evil, sometimes moral evil. But it is always desired and embraced as a good, sub specie boni, i.e. when apprehended as here and now good in the sense of [pg 185] gratifying, pleasure-giving, bonum delectabile. This is possible because pleasure, especially organic, sensible pleasure, as distinct from the state of real well-being which characterizes true happiness, is not the exclusive concomitant of seeking and possessing a real good: it often accompanies the seeking and possessing of a merely apparent good: and in such cases it is itself a merely apparent good, and in reality evil. The unfortunate man who commits suicide does not embrace evil as such. He wrongly judges death to be good, as being in his view a lesser evil than the miseries of his existence, and under this aspect of goodness he embraces death.
Finally we have to inquire whether evil has an efficient cause. Seeing that it is not merely a logical figment, seeing that it really affects actual things, that it really occurs in the actual universe, it must have a real source among the efficient causes of these actual things that make up the universe. It is undoubtedly due to the action of efficient causes, i.e. to the failure, the defective action, of efficient causes. But being itself something negative, a privation, it cannot properly be said to have an “efficient” cause; for the influence of an efficient cause is positive action, which in turn must have for its term something positive, something real, and therefore good. Hence St. Augustine very properly says that evil should be described as having a “deficient” cause rather than an “efficient” cause.[191] In other words, evil is not the direct, natural or normal result of the activity of efficient causes; for this result is always good. It must therefore be always an indirect, abnormal, accidental consequence of their activity. Let us see how this can be—firstly in regard to physical evil, then in regard to moral evil.