You mean the sun, as you and all mankind say.
May not the relation of sight to this deity be described as follows?
How?
Neither sight nor the eye in which sight resides is the sun?
No.
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?
Exactly.
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?
Certainly.
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 only the author of visibility in all visible things, but of generation and nourishment and growth, though he himself is not generation?
Certainly.
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.
I will do my best, I said; but I should think that a great deal will have to be omitted.
You have to imagine, then, that there are two ruling powers, and that one of them is set over the intellectual world, the other over the visible.
Themes
◆Anthropomorphismtheology
Attributing human characteristics, emotions, or form to the divine; embodied divine imagery.
The text uses human imagery to describe divine attributes, such as the sun being an 'author' rather than a mere 'deity'.
The Hermetic axiom that the structure of the cosmos is reflected at every scale — 'as above, so below; as within, so without' — making each level a legible map of the others.
The passage explicitly draws a structural parallel between the relationship of sight to the sun and the relationship of mind to the good in the intellectual world.
A chain of divine beings or principles flowing downward from a single transcendent source (the One or the Father), each level less perfect than the one above.
The passage describes a hierarchy where the sun produces visibility but is not itself visibility, mirroring the good's role in producing knowledge without being knowledge itself.
Augustinian and Plotinian doctrine that evil has no positive being of its own but is a lack, distortion, or absence of the good — denying ontological dualism while preserving moral seriousness.
The 'twilight of becoming and perishing' is contrasted with truth and being, implying that evil is a lack or absence of the good rather than a positive force.
Diotima's staged ascent from love of beautiful bodies → beautiful souls → beautiful pursuits → beautiful knowledge → Beauty itself; the canonical scala amoris that grounds Plotinus's On the Beautiful and Bruno's Eroici Furori — distinct from generic spiritual_ascent in that eros is the specific motive force.
The ascent from seeing dimly to clearly mirrors the movement from opinion to truth and knowledge.