Thus in mediaeval education, and in the successive order of appropriating the patristic and the antique, logic stood on grammar’s shoulders. It was grammar’s rationalized stage, and treated language as the means of expressing thought consistently and validly; that is, so as not to contravene the necessities of that whereof it was the vehicle. And since language thus treated was in accord with rational thought, it would accord with the realities to which thought corresponds; and might be taken as expressing them. This last reflection introduces metaphysics.
And properly. For the three stages in the mediaeval appropriation and expression of knowledge were grammar, logic, metaphysics. Logic has to do with the processes of thought; with the positing of premises and the drawing of the conclusion. It does not necessarily consider whether the contents of its premises represent realities. This is matter for ontology, metaphysics. Now mediaeval metaphysics, which were those of Greek philosophy, were extremely pre-Kantian, in assuming a correspondence between the necessities or conclusions of thought and the supreme realities, God and the Universe. Nor did mediaeval logic doubt that its processes could elucidate and express the veritable natures of things. So mediaeval logic readily wandered into the province of metaphysics, and ignored the line between the two.
Yet there is little metaphysics in the Organon; none in its simpler treatises. So there was none in the elementary logical instruction of the schools before the twelfth century at least.[456] One may always distinguish between logic and metaphysics; and it is to our purpose to do so here. For as we have taken logic to represent the second stage in the mediaeval appropriation of knowledge, so metaphysics, poised in turn on logic’s shoulders, is very representative of the third stage, to wit, the stage of systematic and organic re-expression of the ancient matter, with elements added by the great schoolmen.
Metaphysics was very properly the final stage. The grammatical represented an elementary learning of what the past had transmitted; the logical a further retrying of the matter, an attempt to understand and express it, formulate parts of it anew, with deeper consistency of expression. Then follows the attempt for final and universal consistency: final inasmuch as thought penetrates to the nature of things and expresses realities and the relationships of realities; and universal, in that it seeks to order and systematize all its concepts, and bring them to unity in a Summa—a perfected scheme of rational presentation of God and His creation. This will be, largely speaking, the final endeavour of the mediaeval man to ease his mind, and realize his impulse to know and express himself with uttermost consistency.
So for mediaeval men, metaphysics stood on logic’s shoulders and represented the final completion of their thought, in a universal system and scheme of God and man and things.[457] But the first part of this proposition had not been true with Greek philosophy. Metaphysics is properly occupied with being, in its ultimate essence and relationships; with the consistent putting together of things, to wit, the presentation or expression of them so as not to disagree with any of the data recognized as pertinent. The thinker considers profoundly, seeking to penetrate the ultimate reality and relationships of things, through which a universal whole is constituted. This makes ontology, metaphysics—the science of being, of causes, and so the science of the first Cause, God. Aristotle called this the “first” philosophy, because lying at the base of all branches of knowledge, and depending on nothing beyond itself. Some time after his death, the Peripatetics and then the Neo-Platonists called this first science by the name of Metaphysics, “after” or “beyond” physics, if one will, perhaps because of the actual order of treatment in the schools.
The term Metaphysics is vague enough; either “first” philosophy or “ontology” is preferable. Yet as to Greek philosophy the term has apt historical suggestiveness. For it did come after physics in time, and was in fact evoked by the imperfect method and consequent contradictions of the earlier philosophies. From the beginning, Greek philosophy drove straight at the cause or origin of things—surely the central problem of metaphysics. Thales and the other Ionians began with rational, though crude, hypotheses as to the sources of the universe. These were first attempts to reach a consistent expression of its origin and nature. Each succeeding philosopher considered further, from the vantage-ground of the recognized inconsistencies or inadequacies in the theories of his predecessors. He was thus led on to consider more profoundly the essential relationships of things, the very truth of their relationships, and on and on into the problem of their being. For the verity of relations must be according to the verity of being of the things related. The world about us consists in relationships, of antecedents and sequences, of cause and effect; and our thought of it is made up of consistencies or contradictions, which last we struggle to eliminate, or to transform to consistencies.
These early philosophers looked only to the Aristotelian material cause for the origin and cause of things; yet reflection plunged them deeper into a consideration of the nature of being and relationships. The other causes were evoked by Anaxagoras and then by Plato, and by them were led into the arena of debate; and philosophers discussed the efficient and final cause as well as the material. Such discussions are recognized by Plato, and finally by Aristotle as relating to the first principles of cognition and being, and so as constituting metaphysics. The constant search for a deeper consistency of explanation had led on and on through a manifold consideration of those palpable relationships which make up the visible world; it had disclosed the series of necessary assumptions required by those visible relationships; and thus the search for causality and origins, and essential relationships, became one and the same—metaphysics.
Metaphysics was not ineptly called so, since it had in time come after the cruder physical hypotheses. But such was not the order of mediaeval intellectual progress. The Middle Ages passed through no preliminary course of physical hypotheses, explanatory of the universe. Not physics, but logic (introduced by grammar) led up to the final construction—or rather adoption and reconstruction—of ultimate hypotheses as to God and man, led up to the all-ordering and all-compassing Theologia. Metalogics, rather than Metaphysics, would be the proper name for these final expressions or actualizations of the mediaeval impulse to know.