The Theology of Plato, Volume 1 (Books 1-5)

O Pericles, to me the dearest of friends, I am of opinion that the whole philosophy of Plato was at first unfolded into light through the beneficent will of superior natures, exhibiting the intellect concealed in them, and the truth subsisting together with beings, to souls conversant with generation (so far as it is lawful for them to participate of such supernatural and mighty good); and again, that afterwards having received its perfection, returning as it were into itself, and becoming unapparent to many who professed to philosophize, and who earnestly desired to engage in the investigation of true being, it again advanced into light. But I particularly think that the mystic doctrine respecting divine concerns, which is purely established on a sacred foundation, and which perpetually subsists with the gods themselves, became thence apparent to such as are capable of enjoying it for a time, through one man, whom I should not err in calling the primary leader and hierophant of those true mysteries, into which souls separated from terrestrial places are initiated, and of those entire and stable visions, which those participate who genuinely embrace a happy and blessed life. But this philosophy shone forth at first from him so venerably and arcanely, as if established in sacred temples, and within their adyta, and being unknown to many who have entered into these holy places, in certain orderly periods of time, proceeded as much as was possible for it into light, through certain true priests, and who embraced a life corresponding to the tradition of such mystic concerns. It appears likewise to me, that the whole place became splendid, and that illuminations of divine spectacles every where presented themselves to the view.