Again, before a contingent thing comes into actual existence it may be virtually and potentially in the active powers and passive potentialities of other actually existing contingent things: as the oak, for instance, is in the passive potentiality of the acorn and in the active powers of the natural agencies whereby it is evolved from the acorn; or the statue in the block of marble and in the mind and artistic power of the sculptor. But neither is there any question here of the relation of such potential being [pg 104] or essence as a thing has in its causes to the actual existence of this thing when actually produced. Whatever being or essence it has in its active and passive causes is certainly really distinct from the existence which the thing has when it has been actually produced. Nor is there any doubt or dispute about this point. At the same time much controversy is due to misunderstandings arising from a confusion of thought which fails to distinguish between the essence as purely possible, the essence as virtually or potentially in its causes, and the essence as actually existing. It is about the distinction between the latter and its existence that the whole question is raised. And it must be borne in mind that this essence, whether it is really distinct from its existence or not, is itself a positive reality from the moment it is created or produced. The question is whether the creative or productive act—whereby this essence is placed “outside its causes,” and is now no longer merely possible, or merely virtual or potential in its causes, but something real in itself—has for its term one reality, or two realities, viz. the essence as real subjective potentiality of existence, and the existential act or perfection whereby it is constituted actually existent.[117]

The question is exclusively concerned with the essence which began to exist when the contingent being came into actual existence, and which ceases to exist when, or if, this being again passes out of actual existence; and the question is whether this essence which actually exists is really distinct from the existence whereby it actually exists. Finally, the question concerns the essence and existence of any and every actual contingent reality, whether such reality be a substance or an accident. Of course it is primarily concerned with the essence and existence of substances; but it also applies to the essence and existence of accidents in so far as these latter will be found to be really distinct from the substances in which they inhere, and to have reality proper to themselves.

23. The Theory of Distinctions in its Application to the Question.—In the next place, what are we to understand by a real distinction in this matter? Ambiguity and obscurity of thought in regard to the theory of distinctions, and in regard to the application of the theory to the present question, has been probably the most fertile source of much tedious and fruitless controversy in this connexion.

Anticipating what will be considered more fully at a later stage ([30]), we must note here the two main classes of distinction which, by reflecting on our thought-processes, we discover between the objects of our thought. The real distinction is that which exists in things independently of the consideration of our minds; that which is discovered, but not made, by the mind; that which is given to us in and with the data of our experience. For example, the act of thinking is a reality other than, and therefore really distinct from, the mind that thinks; for the mind persists after the act of thinking has passed away.

Opposed to this is the mental or logical distinction, which is the distinction made by the mind itself between two different concepts of one and the same reality; which is not in the reality independently of our thought, but is introduced into it by our thought, regarding the same reality under different aspects or from different points of view. The mind never makes such a distinction without some ground or reason for doing so.

Sometimes, however, this reason will be found exclusively in the mind itself—in the limitations of its modes of thought—and not in the reality which is the matter or object of the thought. The distinction is then said to be purely logical or mental. Such distinctions are entia rationis, logical entities. An example would be the distinction between the concept “man” and the concept “rational animal,” or, in general, between any definable object of thought and its definition; the distinction, therefore, between the essence and the existence of the Necessary Being is a purely logical distinction, for in a definition it is the essence of the thing we define, and existence is of the essence or definition of the Necessary Being.

Sometimes, again, the reason for making a mental distinction will be found in the reality itself. What is one and the same reality presents different aspects to the mind and evokes different concepts of itself in the mind: though really one, it is virtually manifold; and the distinction between the concepts of these various aspects is commonly known as a virtual distinction. For example, when we think of any individual man as a “rational animal,” though our concept of “animal nature” is distinct from that of “rational nature,” we do not regard these in him as two realities co-existing or combining to form his human nature, but only as two distinct aspects under which we view the one reality which is his human nature. And we view it under [pg 106] these two aspects because we have actual experience of instances in which animal nature is really distinct and separated from rationality, e.g., in the brute beast. Or, again, since we can recognize three grades of life in man—vegetative, sentient, and rational—we conceive the one principle of life, his soul, as virtually three principles; and so we distinguish mentally or virtually between three souls in man, although in reality there is only one. Or, once more, when we think of the Wisdom, the Will, and the Omnipotence of God, we know that although these concepts represent different aspects of the Deity, these aspects are not distinct realities in Him; but that because of His infinite perfection and infinite simplicity they are all objectively one and the same self-identical reality.

A virtual distinction is said to be imperfect (thus approaching nearer to the nature of a purely logical distinction) when each of the concepts whereby we apprehend the same reality only prescinds explicitly from what is expressed by the other, although one of them is found on analysis to include implicitly what is expressed by the other. Such is the distinction between the being and the life of any living thing; or the distinction between the spirituality and the immortality of the human soul; or the distinction between Infinite Wisdom and Infinite Power: the distinction between the divine attributes in general. A virtual distinction is said to be perfect (thus approaching nearer to the nature of a real distinction) when neither of the concepts includes either explicitly or implicitly what is expressed by the other. Such, for instance, is the distinction between the principle of intellectual life and the principle of animal or sentient life in man; for not only can these exist separately (the former without the latter, e.g. in pure spirits, the latter without the former, e.g. in brute beasts), but also it will be found that by no analysis does either concept in any way involve the other.[118]

Our only object in setting down the various examples just given is to illustrate the general scholastic teaching on the doctrine of distinction. In themselves they are not beyond dispute, for the general doctrine of distinction is not easy of application in detail; but they will be sufficient for our present purpose. Probably the greatest difficulty in applying the general doctrine will be found to lie in discriminating between virtual distinctions—especially perfect virtual distinctions—and real [pg 107] distinctions.[119] And this difficulty will be appreciated still more when we learn that a real distinction does not necessarily involve separability of the objects so distinguished. In other words there may be, in a composite existing individual being, constitutive factors or principles, or integral parts, each of which is a positive real entity, really distinct from the others, and yet incapable of existing separately or in isolation from the others. “Separability,” says Mercier,[120] “is one of the signs of a real distinction; but it is neither essential to, nor a necessary property of the latter. Two separable things are of course really distinct from each other; but two entities may be really distinct from each other without being separable or capable of existing apart from each other. Thus we believe that the intellect and the will in man are really distinct from each other, and both alike from the substance of the human soul; yet they cannot exist isolated from the soul.” Therefore, even though the objects which we apprehend as distinct, by means of distinct concepts, be understood to be such that they cannot actually exist in isolation from each other, but only as united in a composite individual being, still if it can be shown that each of them has its own proper reality independently of our thought, so that the distinction between them is not the result of our thought, or introduced by our thought into the individual thing or being which we are considering, then the distinction must be regarded as real. If, on the other hand, it can be shown that the different aspects which we apprehend in any datum by means of distinct concepts have not, apart from the consideration of the mind, apart from the analytic activity of our own thought, each its own proper reality, but are only distinct mental views of what is objectively one and the same reality, then the distinction must be regarded as logical, not real,—and this even although there may be in the richness and fulness of that one reality comparatively to the limited capacity of our minds, as well as in the very constitution and modes of thought of our minds themselves, a reason or basis for, and an explanation of, the multiplicity of concepts whereby we attain to an understanding of some one reality.

24. Solutions of the Question.—Postponing further [pg 108] consideration of the serious problems on the validity of knowledge and its relation to reality, to which those reflections inevitably give rise, let us now return to the main question: the nature of the distinction between the essence and the existence of any actually existing contingent being. We need not be surprised to find that the greatest minds have been unable to reach the same solution of this question. For it is but a phase of the more general metaphysical problem—at once both ontological and epistemological—of the nature of reality and the relation of the human mind thereto. Nor will any serious modern philosopher who is at all mindful of the wealth of current controversial literature on this very problem, or of the endless variety of conflicting opinions among contemporary thinkers in regard to it, be disposed to ridicule the medieval controversies on the doctrine of distinction as applied to essence and existence. No doubt there has been a good deal of mere verbal, and perhaps trifling, argumentation on the matter: it lends itself to the dialectical skill of the controversialist who “takes sides,” as well as to the serious thought of the open-minded investigator. It is not, however, through drawing different conclusions from the same premisses that conflicting solutions of the question have been reached, but rather through fundamentally different attitudes in regard to the premisses themselves which different philosophers profess to find in the common data of their experience. When we have once grasped what philosophers mean by a logical or a real distinction as applied to the relation between essence and existence we shall not get any very material assistance towards the choice of a solution by considering at length the arguments adduced on either side.[121]