Summa Theologica

Chapter 50

Obj. 3: Further, Boethius says of G.o.d (De Trin. i), that "this is truly one which has no number." But plurality implies number.

Therefore there are not several persons in G.o.d.

Obj. 4: Further, where number is, there is whole and part. Thus, if in G.o.d there exist a number of persons, there must be whole and part in G.o.d; which is inconsistent with the divine simplicity.

_On the contrary,_ Athanasius says: "One is the person of the Father, another of the Son, another of the Holy Ghost." Therefore the Father, and the Son, and the Holy Ghost are several persons.

_I answer that,_ It follows from what precedes that there are several persons in G.o.d. For it was shown above (Q. 29, A. 4) that this word "person" signifies in G.o.d a relation as subsisting in the divine nature. It was also established (Q. 28, A. 1) that there are several real relations in G.o.d; and hence it follows that there are also several realities subsistent in the divine nature; which means that there are several persons in G.o.d.

Reply Obj. 1: The definition of "person" includes "substance," not as meaning the essence, but the _suppositum_ which is made clear by the addition of the term "individual." To signify the substance thus understood, the Greeks use the name "hypostasis." So, as we say, "Three persons," they say "Three hypostases." We are not, however, accustomed to say Three substances, lest we be understood to mean three essences or natures, by reason of the equivocal signification of the term.

Reply Obj. 2: The absolute properties in G.o.d, such as goodness and wisdom, are not mutually opposed; and hence, neither are they really distinguished from each other. Therefore, although they subsist, nevertheless they are not several subsistent realities--that is, several persons. But the absolute properties in creatures do not subsist, although they are really distinguished from each other, as whiteness and sweetness; on the other hand, the relative properties in G.o.d subsist, and are really distinguished from each other (Q. 28, A. 3). Hence the plurality of persons in G.o.d.

Reply Obj. 3: The supreme unity and simplicity of G.o.d exclude every kind of plurality of absolute things, but not plurality of relations.

Because relations are predicated relatively, and thus the relations do not import composition in that of which they are predicated, as Boethius teaches in the same book.

Reply Obj. 4: Number is twofold, simple or absolute, as two and three and four; and number as existing in things numbered, as two men and two horses. So, if number in G.o.d is taken absolutely or abstractedly, there is nothing to prevent whole and part from being in Him, and thus number in Him is only in our way of understanding; forasmuch as number regarded apart from things numbered exists only in the intellect. But if number be taken as it is in the things numbered, in that sense as existing in creatures, one is part of two, and two of three, as one man is part of two men, and two of three; but this does not apply to G.o.d, because the Father is of the same magnitude as the whole Trinity, as we shall show further on (Q. 42, AA. 1, 4).

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SECOND ARTICLE [I, Q. 30, Art. 2]

Whether There Are More Than Three Persons in G.o.d?

Objection 1: It would seem that there are more than three persons in G.o.d. For the plurality of persons in G.o.d arises from the plurality of the relative properties as stated above (A. 1). But there are four relations in G.o.d as stated above (Q. 28, A. 4), paternity, filiation, common spiration, and procession. Therefore there are four persons in G.o.d.

Obj. 2: The nature of G.o.d does not differ from His will more than from His intellect. But in G.o.d, one person proceeds from the will, as love; and another proceeds from His nature, as Son. Therefore another proceeds from His intellect, as Word, besides the one Who proceeds from His nature, as Son; thus again it follows that there are not only three persons in G.o.d.

Obj. 3: Further, the more perfect a creature is, the more interior operations it has; as a man has understanding and will beyond other animals. But G.o.d infinitely excels every creature. Therefore in G.o.d not only is there a person proceeding from the will, and another from the intellect, but also in an infinite number of ways. Therefore there are an infinite number of persons in G.o.d.

Obj. 4: Further, it is from the infinite goodness of the Father that He communicates Himself infinitely in the production of a divine person. But also in the Holy Ghost is infinite goodness. Therefore the Holy Ghost produces a divine person; and that person another; and so to infinity.

Obj. 5: Further, everything within a determinate number is measured, for number is a measure. But the divine persons are immense, as we say in the Creed of Athanasius: "The Father is immense, the Son is immense, the Holy Ghost is immense." Therefore the persons are not contained within the number three.

_On the contrary,_ It is said: "There are three who bear witness in heaven, the Father, the Word, and the Holy Ghost" (1 John 5:7). To those who ask, "Three what?" we answer, with Augustine (De Trin. vii, 4), "Three persons." Therefore there are but three persons in G.o.d.

_I answer that,_ As was explained above, there can be only three persons in G.o.d. For it was shown above that the several persons are the several subsisting relations really distinct from each other. But a real distinction between the divine relations can come only from relative opposition. Therefore two opposite relations must needs refer to two persons: and if any relations are not opposite they must needs belong to the same person. Since then paternity and filiation are opposite relations, they belong necessarily to two persons.

Therefore the subsisting paternity is the person of the Father; and the subsisting filiation is the person of the Son. The other two relations are not opposed to each other; therefore these two cannot belong to one person: hence either one of them must belong to both of the aforesaid persons; or one must belong to one person, and the other to the other. Now, procession cannot belong to the Father and the Son, or to either of them; for thus it would follows that the procession of the intellect, which in G.o.d is generation, wherefrom paternity and filiation are derived, would issue from the procession of love, whence spiration and procession are derived, if the person generating and the person generated proceeded from the person spirating; and this is against what was laid down above (Q. 27, AA.

3, 4). We must consequently admit that spiration belongs to the person of the Father, and to the person of the Son, forasmuch as it has no relative opposition either to paternity or to filiation; and consequently that procession belongs to the other person who is called the person of the Holy Ghost, who proceeds by way of love, as above explained. Therefore only three persons exist in G.o.d, the Father, the Son, and the Holy Ghost.

Reply Obj. 1: Although there are four relations in G.o.d, one of them, spiration, is not separated from the person of the Father and of the Son, but belongs to both; thus, although it is a relation, it is not called a property, because it does not belong to only one person; nor is it a personal relation--i.e. const.i.tuting a person. The three relations--paternity, filiation, and procession--are called personal properties, const.i.tuting as it were the persons; for paternity is the person of the Father, filiation is the person of the Son, procession is the person of the Holy Ghost proceeding.

Reply Obj. 2: That which proceeds by way of intelligence, as word, proceeds according to similitude, as also that which proceeds by way of nature; thus, as above explained (Q. 27, A. 3), the procession of the divine Word is the very same as generation by way of nature. But love, as such, does not proceed as the similitude of that whence it proceeds; although in G.o.d love is co-essential as being divine; and therefore the procession of love is not called generation in G.o.d.

Reply Obj. 3: As man is more perfect than other animals, he has more intrinsic operations than other animals, because his perfection is something composite. Hence the angels, who are more perfect and more simple, have fewer intrinsic operations than man, for they have no imagination, or feeling, or the like. In G.o.d there exists only one real operation--that is, His essence. How there are in Him two processions was above explained (Q. 27, AA. 1, 4).

Reply Obj. 4: This argument would prove if the Holy Ghost possessed another goodness apart from the goodness of the Father; for then if the Father produced a divine person by His goodness, the Holy Ghost also would do so. But the Father and the Holy Ghost have one and the same goodness. Nor is there any distinction between them except by the personal relations. So goodness belongs to the Holy Ghost, as derived from another; and it belongs to the Father, as the principle of its communication to another. The opposition of relation does not allow the relation of the Holy Ghost to be joined with the relation of principle of another divine person; because He Himself proceeds from the other persons who are in G.o.d.

Reply Obj. 5: A determinate number, if taken as a simple number, existing in the mind only, is measured by one. But when we speak of a number of things as applied to the persons in G.o.d, the notion of measure has no place, because the magnitude of the three persons is the same (Q. 42, AA. 1, 4), and the same is not measured by the same.

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THIRD ARTICLE [I, Q. 30, Art. 3]

Whether the Numeral Terms Denote Anything Real in G.o.d?

Objection 1: It would seem that the numeral terms denote something real in G.o.d. For the divine unity is the divine essence. But every number is unity repeated. Therefore every numeral term in G.o.d signifies the essence; and therefore it denotes something real in G.o.d.

Obj. 2: Further, whatever is said of G.o.d and of creatures, belongs to G.o.d in a more eminent manner than to creatures. But the numeral terms denote something real in creatures; therefore much more so in G.o.d.

Obj. 3: Further, if the numeral terms do not denote anything real in G.o.d, and are introduced simply in a negative and removing sense, as plurality is employed to remove unity, and unity to remove plurality; it follows that a vicious circle results, confusing the mind and obscuring the truth; and this ought not to be. Therefore it must be said that the numeral terms denote something real in G.o.d.

_On the contrary,_ Hilary says (De Trin. iv): "If we admit companionship"--that is, plurality--"we exclude the idea of oneness and of solitude;" and Ambrose says (De Fide i): "When we say one G.o.d, unity excludes plurality of G.o.ds, and does not imply quant.i.ty in G.o.d."

Hence we see that these terms are applied to G.o.d in order to remove something; and not to denote anything positive.

_I answer that,_ The Master (Sent. i, D, 24) considers that the numeral terms do not denote anything positive in G.o.d, but have only a negative meaning. Others, however, a.s.sert the contrary.

In order to resolve this point, we may observe that all plurality is a consequence of division. Now division is twofold; one is material, and is division of the continuous; from this results number, which is a species of quant.i.ty. Number in this sense is found only in material things which have quant.i.ty. The other kind of division is called formal, and is effected by opposite or diverse forms; and this kind of division results in a mult.i.tude, which does not belong to a genus, but is transcendental in the sense in which being is divided by one and by many. This kind of mult.i.tude is found only in immaterial things.

Some, considering only that mult.i.tude which is a species of discrete quant.i.ty, and seeing that such kind of quant.i.ty has no place in G.o.d, a.s.serted that the numeral terms do not denote anything real in G.o.d, but remove something from Him. Others, considering the same kind of mult.i.tude, said that as knowledge exists in G.o.d according to the strict sense of the word, but not in the sense of its genus (as in G.o.d there is no such thing as a quality), so number exists in G.o.d in the proper sense of number, but not in the sense of its genus, which is quant.i.ty.

But we say that numeral terms predicated of G.o.d are not derived from number, a species of quant.i.ty, for in that sense they could bear only a metaphorical sense in G.o.d, like other corporeal properties, such as length, breadth, and the like; but that they are taken from mult.i.tude in a transcendent sense. Now mult.i.tude so understood has relation to the many of which it is predicated, as "one" convertible with "being"

is related to being; which kind of oneness does not add anything to being, except a negation of division, as we saw when treating of the divine unity (Q. 11, A. 1); for "one" signifies undivided being.

So, of whatever we say "one," we imply its undivided reality: thus, for instance, "one" applied to man signifies the undivided nature or substance of a man. In the same way, when we speak of many things, mult.i.tude in this latter sense points to those things as being each undivided in itself.

But number, if taken as a species of quant.i.ty, denotes an accident added to being; as also does "one" which is the principle of that number. Therefore the numeral terms in G.o.d signify the things of which they are said, and beyond this they add negation only, as stated (Sent. i, D, 24); in which respect the Master was right (Sent. i, D, 24). So when we say, the essence is one, the term "one" signifies the essence undivided; and when we say the person is one, it signifies the person undivided; and when we say the persons are many, we signify those persons, and their individual undividedness; for it is of the very nature of mult.i.tude that it should be composed of units.

Reply Obj. 1: One, as it is a transcendental, is wider and more general than substance and relation. And so likewise is mult.i.tude; hence in G.o.d it may mean both substance and relation, according to the context. Still, the very signification of such names adds a negation of division, beyond substance and relation; as was explained above.

Reply Obj. 2: Mult.i.tude, which denotes something real in creatures, is a species of quant.i.ty, and cannot be used when speaking of G.o.d: unlike transcendental mult.i.tude, which adds only indivision to those of which it is predicated. Such a kind of mult.i.tude is applicable to G.o.d.

Reply Obj. 3: "One" does not exclude mult.i.tude, but division, which logically precedes one or mult.i.tude. Mult.i.tude does not remove unity, but division from each of the individuals which compose the mult.i.tude. This was explained when we treated of the divine unity (Q.

11, A. 2).

It must be observed, nevertheless, that the opposite arguments do not sufficiently prove the point advanced. Although the idea of solitude is excluded by plurality, and the plurality of G.o.ds by unity, it does not follow that these terms express this signification alone. For blackness is excluded by whiteness; nevertheless, the term whiteness does not signify the mere exclusion of blackness.

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FOURTH ARTICLE [I, Q. 30, Art. 4]

Whether This Term "Person" Can Be Common to the Three Persons?

Objection 1: It would seem that this term "person" cannot be common to the three persons. For nothing is common to the three persons but the essence. But this term "person" does not signify the essence directly.

Therefore it is not common to all three.

Obj. 2: Further, the common is the opposite to the incommunicable.

But the very meaning of person is that it is incommunicable; as appears from the definition given by Richard of St. Victor (Q. 29, A.

3, ad 4). Therefore this term "person" is not common to all the three persons.

Obj. 3: Further, if the name "person" is common to the three, it is common either really, or logically. But it is not so really; otherwise the three persons would be one person; nor again is it so logically; otherwise person would be a universal. But in G.o.d there is neither universal nor particular; neither genus nor species, as we proved above (Q. 3, A. 5). Therefore this term "person" is not common to the three.

_On the contrary,_ Augustine says (De Trin. vii, 4) that when we ask, "Three what?" we say, "Three persons," because what a person is, is common to them.

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