“The sun is invisible in men, but visible in the world, yet both are of one and the same sun.”

Upon the Sovereign Sun (362)
Context: Come then, and let us celebrate in the best way we can the anniversary festival which the imperial city is keeping by sacrifices, with unusual splendour. And yet I feel how difficult it is for the human mind even to form a conception of that Sun who is not visible to the sense, if our notion of Him is to be derived from the Sun that is visible; but to express the same in language, however inadequately, is, perhaps, beyond the capability of man! To fitly explain His glory, I am very well aware, is a thing impossible; in lauding it, however, mediocrity seems the highest point to which human eloquence is able to attain.

Upon the Sovereign Sun (362)
Context: That divine and all-beauteous World, which from the highest vault of Heaven down to the lowest Earth is held together by the immutable providence of God, and which has existed from all eternity, without creation, and shall be eternal for all time to come, and which is not regulated by anything, except approximately by the Fifth Body (of which the principle is the solar light) placed, as it were, on the second step below the world of intelligence; and finally by the means of the "Sovereign of all things, around whom all things stand." This Being, whether properly to be called "That which is above comprehension," or the "Type of things existing," or "The One," (inasmuch as Unity appears to be the most ancient of all things), or "The Good," as Plato regularly designates Him, This, then, is the Single Principle of all things, and which serves to the universe as a model of indescribable beauty, perfection, unity, and power. And after the pattern of the primary substance that dwells within the Principle, He hath sent forth out of Himself, and like in all things unto Himself, the Sun, a mighty god, made up of equal parts of intelligible and creative causes. And this is the sense of the divine Plato, where he writes, "You may say (replied I) that I mean the offspring of the Good, whom the Good has produced, similar to itself; in order that, what the Good is in the region of intelligence, and as regards things only appreciable by the mind, its offspring should be the same in the region that is visible, and in the things that are appreciable by the sight." For this reason I believe that the light of the Sun bears the same relation to things visible as Truth does to things intelligible. But this Whole, inasmuch as it emanates from the Model and "Idea" of the primal and supreme Good, and exists from all eternity around his immutable being, has received sovereignty also over the gods appreciable by the intellect alone, and communicates to them the same good things, (because they belong to the world of intelligence), as are poured down from the Supreme Good upon the other objects of Intelligence. For to these latter, the Supreme Good is the source, as I believe, of beauty, perfection, existence, and union; holding them together and illuminating them by its own virtue which is the "Idea" of the Good.

"Light" (popularly known as "The Night has a Thousand Eyes"), published in The Spectator (October 1873).
Context: p>The Night has a thousand eyes,
And the Day but one;
Yet the light of the bright world dies
With the dying sun.The mind has a thousand eyes,
And the heart but one;
Yet the light of a whole life dies
When love is done.</p

Source: Islands in the Net (1988), Chapter 1 (p. 16)

29
50 Poems (1940)

p, 125
On the Sizes and Distances of the Sun and the Moon (c. 250 BC)

Source: As a Man Thinketh