Archive Authors E.J. Hutchinson Early Church Fathers Nota Bene

The Platonism of Gregory of Nazianzus

It is well known that Platonism was a much more powerful philosophical force in the fourth century than Aristotelianism (this judgment must, of course, be modified somewhat due to the incorporation of elements of Aristotelian philosophy in later strands of Platonism; but that modification is not going to happen in this short post).1 Many images used by Plato and later Platonists proved to be very fruitful for early Christian theologians.

One place in which this can be seen is the twenty-first Oration of Gregory of Nazianzus, “On the Great Athanasius, Bishop of Alexandria.” There, he writes:

For many and great as are our blessings— none can say how many and how great— which we have and shall have from God, this is the greatest and kindliest of all, our inclination and relationship to Him. For God is to intelligible things what the sun is to the things of sense. The one lightens the visible, the other the invisible, world. The one makes our bodily eyes to see the sun, the other makes our intellectual natures to see God. And, as that, which bestows on the things which see and are seen the power of seeing and being seen, is itself the most beautiful of visible things; so God, who creates, for those who think, and that which is thought of, the power of thinking and being thought of, is Himself the highest of the objects of thought, in Whom every desire finds its bourne, beyond Whom it can no further go. For not even the most philosophic, the most piercing, the most curious intellect has, or can ever have, a more exalted object. For this is the utmost of things desirable, and they who arrive at it find an entire rest from speculation. (Oration 21.1)

This might sound familiar to readers of Plato’s Republic, for it seems plausible to suggest that this way of describing knowledge of the sensible and the intelligible was borrowed (in summary form) nearly wholesale from the “Allegory of the Sun” (the main principles of which are reprised again in the “Analogy of the Divided Line” and the “Allegory of the Cave”) in Republic 507b-509c (Book 6), where Socrates engages Glaucon in discussion about the apprehension of the good. Though the selection is long, I include the whole thing here.

…[T]here is a many beautiful and a many good, and so of other things which we describe and define; to all of them the term ‘many’ is applied.

True, he said.

And there is an absolute beauty and an absolute good, and of other things to which the term ‘many’ is applied there is an absolute; for they may be brought under a single idea, which is called the essence of each.

Very true.

The many, as we say, are seen but not known, and the ideas are known but not seen.


And what is the organ with which we see the visible things?

The sight, he said.

And with the hearing, I said, we hear, and with the other senses perceive the other objects of sense?


But have you remarked that sight is by far the most costly and complex piece of workmanship which the artificer of the senses ever contrived?

No, I never have, he said.

Then reflect: has the ear or voice need of any third or additional nature in order that the one may be able to hear and the other to be heard?

Nothing of the sort.

No, indeed, I replied; and the same is true of most, if not all, the other senses—you would not say that any of them requires such an addition?

Certainly not.

But you see that without the addition of some other nature there is no seeing or being seen?

How do you mean?

Sight being, as I conceive, in the eyes, and he who has eyes wanting to see; colour being also present in them, still unless there be a third nature specially adapted to the purpose, the owner of the eyes will see nothing and the colours will be invisible.

Of what nature are you speaking?

Of that which you term light, I replied.

True, he said.

Noble, then, is the bond which links together sight and visibility, and great beyond other bonds by no small difference of nature; for light is their bond, and light is no ignoble thing?

Nay, he said, the reverse of ignoble.

And which, I said, of the gods in heaven would you say was the lord of this element? Whose is that light which makes the eye to see perfectly and the visible to appear?

You mean the sun, as you and all mankind say.

May not the relation of sight to this deity be described as follows?


Neither sight nor the eye in which sight resides is the sun?


Yet of all the organs of sense the eye is the most like the sun?

By far the most like.

And the power which the eye possesses is a sort of effluence which is dispensed from the sun?


Then the sun is not sight, but the author of sight who is recognised by sight?

True, he said.

And this is he whom I call the child of the good, whom the good begat in his own likeness, to be in the visible world, in relation to sight and the things of sight, what the good is in the intellectual world in relation to mind and the things of mind:

Will you be a little more explicit? he said.

Why, you know, I said, that the eyes, when a person directs them towards objects on which the light of day is no longer shining, but the moon and stars only, see dimly, and are nearly blind; they seem to have no clearness of vision in them?

Very true.

But when they are directed towards objects on which the sun shines, they see clearly and there is sight in them?


And the soul is like the eye: when resting upon that on which truth and being shine, the soul perceives and understands, and is radiant with intelligence; but when turned towards the twilight of becoming and perishing, then she has opinion only, and goes blinking about, and is first of one opinion and then of another, and seems to have no intelligence?

Just so.

Now, that which imparts truth to the known and the power of knowing to the knower is what I would have you term the idea of good, and this you will deem to be the cause of science, and of truth in so far as the latter becomes the subject of knowledge; beautiful too, as are both truth and knowledge, you will be right in esteeming this other nature as more beautiful than either; and, as in the previous instance, light and sight may be truly said to be like the sun, and yet not to be the sun, so in this other sphere, science and truth may be deemed to be like the good, but not the good; the good has a place of honour yet higher.

What a wonder of beauty that must be, he said, which is the author of science and truth, and yet surpasses them in beauty; for you surely cannot mean to say that pleasure is the good?

God forbid, I replied; but may I ask you to consider the image in another point of view?

In what point of view?

You would say, would you not, that the sun is not only the author of visibility in all visible things, but of generation and nourishment and growth, though he himself is not generation?


In like manner the good may be said to be not only the author of knowledge to all things known, but of their being and essence, and yet the good is not essence, but far exceeds essence in dignity and power.

Glaucon said, with a ludicrous earnestness: By the light of heaven, how amazing!

Yes, I said, and the exaggeration may be set down to you; for you made me utter my fancies.

And pray continue to utter them; at any rate let us hear if there is anything more to be said about the similitude of the sun.

Yes, I said, there is a great deal more.

Then omit nothing, however slight. (tr. Benjamin Jowett)

Ancient philosophy was of course not a straitjacket for the Fathers, but it did provide material that was useful to think with–mental furniture, as it were, that could be creatively redeployed in a new context. As we see over and over again in the history of Christian thought, anyone who wants to keep Christians from plundering the Egyptians is going to need a better security system–but if put into place, that system, far from protecting the Christian inheritance, would paradoxically rob the church of much that could be tweaked and put to good use.

  1. E.g., on Platonism in Augustine, cf. Eric Parker’s post here.

By E.J. Hutchinson

E.J. Hutchinson is Assistant Professor of Classics at Hillsdale College.

3 replies on “The Platonism of Gregory of Nazianzus”

Intriguing quote. Thanks for posting. I’d really be curious to put together a project on illumination and the interaction between Aristotelian and Platonist sources on this. Two quotes from Aquinas.

Aquinas, ST I.79.3
“According to Plato’s opinion, there was no need to posit an active intellect in order to make things actually intelligible (ad faciendum intelligibilia in actu)—though, as will be explained below (a. 4 and q. 84, a. 6), positing an active intellect was perhaps necessary in order to provide the ‘intelligible light’ for the one having intellective understanding (ad praebendum lumen intelligibile intelligenti). For Plato held that the forms of natural things subsist without matter and are consequently intelligible, since a thing is actually intelligible by virtue of being immaterial. He called them ‘species’ or ‘ideas’ (species sive ideas), and he said that it was by participating in these ideas that (a) corporeal matter is formed in the sense that the individuals are naturally constituted in their own genera and species, and that (b) our intellects are formed in the sense of having knowledge (scientia) of the genera and species of things.

“By contrast, since Aristotle did not hold that the forms of natural things subsist without matter and since forms that exist in matter are not actually intelligible, it followed that the natures or forms of sensible things—natures that we have intellective understanding of—are not actually intelligible. But nothing is brought from potentiality into actuality except by some actual being, in the way that the sensory power is brought into act by what is actually sensible. Therefore, it was necessary to posit some power on the part of the intellect that would render them actually intelligible by abstracting the species from material conditions. And this is why it is necessary to posit an active intellect.”

“However, granted that there is some such separated active intellect, it is nonetheless still necessary to posit within the human soul itself a power which is a participation in that higher intellect and through which the human soul renders things actually intelligible. As in the case of other perfect natural entities, there are, in addition to the universal agent causes, proper powers that are derived from the universal agents and given to individual perfect things. For instance, it is not the sun alone that generates a man; rather, there is in man a power to generate man—and the same holds for the other perfect animals. But among lower things there is none more perfect than the human soul. Hence, one must claim that within the human soul there is a power, derived from a higher intellect, through which it can illuminate phantasms. We know this from experience when we perceive ourselves abstracting universal forms from particular conditions—which is what it is to render things actually intelligible. But as was explained above (q. 76, a. 1) when we were discussing the passive intellect, an action belongs to a being only through some principle that formally inheres in it. Therefore, the power that is the principle of this action must be something within the soul. This is why Aristotle compared the active intellect to light, which is something received in the air.

“Plato, on the other hand, compared the separated intellect that leaves an impression on our souls (imprimentem in animas nostras) to the sun, as Themistius reports in his commentary on De Anima 3. Now according to the teaching of our Faith, this separated intellect is God Himself, who is the creator of the soul and in whom alone the soul is beatified, as will become clear below (q. 90, a. 3 and ST 1-2, q. 3, a. 7). Hence, it is because of Him that the human soul participates in the intellectual light—this according to Psalm 4:7 (“The light of your countenance, O Lord, is signed upon us”).”

Agree with your last paragraph, but I think the title of the post is misleading. Platonsim *in* Gregory of Nazianzus is probably more accurate. Have you read George Karamanolis’s The Philosophy of Early Christianity? The introduction and chapter 1 (“The Christian Conception of Philosophy and Christian Philosophical Methodology”) are good in this regard.

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