From an online bio: “Étienne Henri Gilson was born into a Roman Catholic family in Paris on 13 June 1884. He was educated at a number of Roman Catholic schools in Paris before attending lycée Henri IV in 1902, where he studied philosophy. Two years later he enrolled at the Sorbonne, graduating in 1907 after having studied under many fine scholars, including Lucien Lévy Bruhl, Henri Bergson and Emile Durkheim.
Gilson taught in a number of high schools after his graduation and worked on a doctoral thesis on Descartes, which he successfully completed (Sorbonne) in 1913. On the strength of advice from his teacher, Lévy Bruhl, he began to study medieval philosophy in great depth, coming to see Descartes as having strong connections with medieval philosophy, although often finding more merit in the medieval works he saw as connected than in Descartes himself. He was later to be highly esteemed for his work in medieval philosophy and has been described as something of a saviour to the field.
Gilson’s Gifford Lectures, delivered at Aberdeen in 1931 and 1932, titled ‘The Spirit of Medieval Philosophy’, were published in his native language (L’espirit de la philosophie medieval, 1932) before being translated into English in 1936. Gilson believed that a defining feature of medieval philosophy was that it operated within a framework endorsing a conviction to the existence of God, with a complete acceptance that Christian revelation enabled the refinement of meticulous reason. In this regard he described medieval philosophy as particularly ‘Christian’ philosophy. In 1951 he relinquished his chair at the College de France in order to attend to responsibilities he had at the Institute of Medieval Studies in Toronto, Canada, an institute he had been invited to establish in 1929. Gilson died 19 September 1978 at the age of ninety-four.” The following are reading selections from a chapter devoted to a summary of Thomism.
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One has no doubt perceived the unified character of a doctrine which provides an explanation of the universe and of man from the point of view of human reason. This character is due to the fact that the texture of Thomism is made from a very small number of principles which are finely interwoven. Perhaps, when all is said and done, all these principles are various aspects of one central notion, the notion of being. Human thought is only satisfied when it grasps an existence; but our intellection of a being never limits itself to the sterile apprehension of a given reality.
The apprehended being invites our intellect to explore it; it invites intellectual activity by the very multiplicity of aspects which it reveals. Inasmuch as a being is not distinguished from itself, it is one. In this sense we can say that being and oneness are the same. No essence divides itself without losing at the same time its being and its unity. But since a being is by definition inseparable from itself, it lays the basis of the truth which can be affirmed about it. To say what is true is to say what is, and is to attribute to each thing the very being which it is. Thus it is the being of a thing which founds its truth; and it is the truth of a thing which underlies the truth of thought.
We think the truth of a thing when we attribute to it the being that it has. It is thus that accord is established between our thought and its object; and it is this accord which provides the basis for what is true in our knowledge just as the intimate accord which subsists between its object and the eternal thought which God has of it establishes the truth of the thing outside our thought. The line of the relationships of truth is therefore only one aspect of the line of the relationships of being.
We find exactly the same thing in the case of the good. Every being insofar as it is knowable is the basis of truth. But insofar as it is defined by a certain quantity of perfection and consequently insofar as it is, it is desirable and presents itself to us as a good; and hence the movement to take possession of it which arises in us when we find ourselves in its presence. Thus the same being without the addition of anything from outside, displays before us its unity, its truth and its goodness. Whatever the relationship of identity which our thought can affirm in any one of the moments of the doctrinal synthesis, whatever the truth we set forth or good we desire, our thought always refers to being in order to establish its accord with itself, in order to assimilate its nature by way of knowledge or to enjoy its perfection through the will.
But Thomism is not a system if by this is meant a global explanation of the world deduced or constructed, in an idealistic manner, from a priori principles. The content of the notion of being is not such that it can be defined once and for all and set forth in an a priori way. There are many ways of being, and these ways must be ascertained. The one most immediately given to us is our own and that of corporeal things among which we pass our life.
Each one of us “is,” but in an incomplete and deficient manner. In the field of experience directly accessible to us we only meet substantial composites analogous to ourselves, forms engaged in matters by so indissoluble a bond that their very “engagement” defines these beings and that God’s creative action, when it puts them into existence, directly produces the compounds of matter and form that constitute their beings.
However imperfect such a being may be, it does possess perfection to the extent that it possesses being. We already find in it transcendental relations of unity, truth, goodness and beauty which are inseparable from it and which we have defined. But we note at the same time that, for some deep reason which we have still to determine, these relations are not fixed, closed, definite. Everything takes place — and experience verifies this — as though we had to struggle in order to establish these relationships instead of enjoying them peacefully. We are, and we are identical with ourselves, but not completely so. A sort of margin keeps us a little short of our quiddity. [vocab: In scholastic philosophy, quiddity was another term for the essence of an object, literally its "whatness," or "what it is."] We do not fully realize human essence nor even the complete notion of our individuality.
Hence, it is not simply a matter of being, but of a permanent effort to maintain ourselves in being, to conserve ourselves, realize ourselves. It is just the same with all the other sensible beings which we find around us. There are always forces at work. The world is perpetually agitated by movements. It is in a continual state of becoming, like man himself ceaselessly passing from one state to another.
This universal becoming is normally expressed in terms of the distinction of potency and act, which extends to all given beings within our experience. These notions add nothing to the notion of being. Act always is being; potency always is possible being. Just as Aristotle had stated the universal extension of this principle without attempting to define it, St. Thomas readily uses it without explanation. It is a sort of postulate, a formula stating as a fact the definite modes of being given to us in experience. Any essence which does not completely realize its definition is act in the measure in which it does realize it, potency in the measure in which it does not, and privation in the measure in which it does not realize it. Insofar as it is in act, it is the active principle which will release the motion of realization.
It is from the actuality of form that all endeavors of this kind proceed; it is the source of motion, the reason of becoming; it is cause. Once more, it is the being in things which is the ultimate reason of all the natural processes we have been stating. It is being as such which communicates its form as efficient cause, which produces change as motive cause, and assigns to it a reason for being produced as final cause. We are dealing, then, with beings which are ceaselessly moved by a fundamental need to save and complete themselves.
Now we cannot reflect upon an experience like this without becoming aware that it does not contain the explanation of the facts it places before us. This world of becoming which grows active in order to find itself, these heavenly spheres continually seeking themselves in the successive points of their orbits, these human souls which capture and assimilate being by their intellect, these substantial forms forever searching out new matters in which to realize themselves, do not contain in themselves the explanation of what they are. If such beings were self-explaining, they would be lacking nothing. Or, inversely, they would have to be lacking nothing before they could be self-explaining. But then they would no longer move in search of themselves. They would repose in the integrity of their own essence realized at last. They would cease to be becoming and enjoy the fullness of being.
It is, therefore, outside the world of potency and act, above becoming, and in a being which is what it is totally, that we must look for the cause of the universe. But this being which thought can reach is obviously of a different nature than the being we have been talking about, for if it were not different from the being which experience gives, there would be no point in positing it. Thus the world of becoming postulates a principle removed from becoming and placed entirely outside it.
But then a new problem arises. If the being we postulate from experience is radically different from the one given to us in experience, how can we know it through this experience and how shall we even explain it in terms of this experience? Nothing can be deduced or inferred about a being from some other being which does not exist in the same sense as the first one does. Our thought would be quite inadequate to proceed to such a conclusion unless the reality in which we moved formed, by its hierarchical and analogical structure, a sort of ladder leading toward God.
It is precisely because every operation is the realization of an essence, and because every essence is a certain quantity of being and perfection, that the universe reveals itself to us as a society made up of superiors and inferiors. The very definition of each essence ranks it immediately in its proper place in this hierarchy. To explain the operation of an individual thing, not only must we have the notion of this individual, but we must also have the definition of the essence which it embodies in a deficient manner. And the species itself is not enough because the individuals which go to make up the species are ceaselessly striving to realize themselves. Thus it becomes necessary either to renounce trying to account for this operation or else to seek for its explanation at a higher level, in a superior grade of perfection.
From here on, the universe appears essentially a hierarchy and the philosophical problem is to indicate its exact arrangement and to place each class of beings in its proper grade. To do this, one principle of universal value must always be kept in mind: that the greater or less can only be appraised and classified in relation to the maximum, the relative in relation to the absolute. Between God who is Being, pure and simple, and complete nothingness, there come near God pure intelligences known as angels and near nothingness material forms. Between angels and material nature come human creatures on the borderline between spirits and bodies. Thus the angels reduce the infinite gap separating man from God and man fills in the gap between angels and matter.
Each of these degrees has its own mode of operation since each being operates according as it is in act and as its degree of actuality merges with its degree of perfection. The orderly and arranged hierarchy of beings is thus made complete by the orderly and arranged hierarchy of their operations, and in such a way that the bottom of the higher degree invariably comes into close contact with the top of the lower. Thus the principle of continuity gives precision and determination to the principle of perfection. Actually, both of these principles but express the higher law governing the communication of being. There is no being save the divine being in which all creatures participate; and creatures only differ from one another by reason of their greater or lesser degree of participation in the divine being.‘ Their perfection must, accordingly, be measured by the distance separating them from God. It is in thus differentiating themselves from one another that they arrange themselves into a hierarchy.
If this is true, it is analogy alone which enables our intelligence to arrive at a transcendent God from sensible things. It is analogy, too, which alone permits us to say that the universe has its existence from a transcendental principle and yet is neither confused with it nor added to it. The similarity of the analogue has, of course, to be explained, and it can only be explained by means of what the analogue imitates: “For (being) is not said of many equivocally, but analogically, and thus must be reduced to unity.” 2
But at the same time that it possesses enough of its model’s being to require it as its cause, it possesses it in such a manner that the being of this cause does not become involved in that of the thing caused. And because the word “being” signifies two different modes of existence when applied to God and to creatures, no problem of addition or subtraction can arise. The being of creatures is only an image, an imitation of the divine being. Even as reflections appear about a flame, increasing, decreasing and disappearing, without the substance of the flame being affected, so the likenesses freely created by the divine substance owe all their being to this substance. They subsist only through it, yet borrow nothing from its per se mode of being, a mode very different from their own. They neither add to it nor subtract from it even in the least degree.
These two principles, analogy and hierarchy, enable us to explain the creature through a transcendent Creator. They also permit us to maintain relations between them and to extend bonds between them which become the constitutive principles of created essences and the laws which serve to explain them. Whatever physics or natural philosophy ultimately shows to be the nature of things, it has necessarily to remain subordinate to a metaphysics of being. If creatures are similitudes in what concerns their basic origin, then it is to be expected that analogy will serve to explain the universe just as it explains creation. To account for the operation of a being, we shall always have to show that its operation is based, beyond its essence in its act-of-being. And to give account of this essence will always be to show that a definite degree of participation in being, corresponding exactly to what this essence is, ought to have a place in our universe.
But why was such a determined similitude required by a universe like ours? It is because the similitudes of any model can only be essentially different if they are more or less perfect. A finite system of images of an infinite being must have all the real degrees of likeness which can appear within the bounds assigned to the system by the free will of the Creator. The metaphysical explanation of a physical phenomenon must always be concerned with putting an essence in its place in a hierarchy.










