“To God, truly, the Giver and Architect of Forms, and it may be to the angels and higher intelligences, it belongs to have an affirmative knowledge of forms immediately, and from the first contemplation. But this assuredly is more than man can do, to whom it is granted only to proceed at first by negatives, and at last to end in affirmatives, after exclusion has been exhausted.”

"The Art of Fiction: An Interview" (The Paris Review, Spring 1955), in The Collected Essays, ed. John F. Callahan (New York: Modern Library, 1995), p. 218.

Congressional speech (1849)
Context: I affirm, in words as true and literal as any that belong to geometry, that the man who withholds knowledge from a child not only works diabolical miracles for the destruction of good, but for the creation of evil also. He who shuts out truth, by the same act opens the door to all the error that supplies its place. Ignorance breeds monsters to fill up all the vacuities of the soul that are unoccupied by the verities of knowledge. He who dethrones the idea of law, bids chaos welcome in its stead. Superstition is the mathematical complement of religious truth; and just so much less as the life of a human being is reclaimed to good, just so much more is it delivered over to evil. The man or the institution, therefore, that withholds knowledge from a child, or from a race of children, exercises the awful power of changing the world in which they are to live, just as much as though he should annihilate all that is most lovely and grand in this planet of ours, or transport the victim of his cruelty to some dark and frigid zone of the universe, where the sweets of knowledge are unknown, and the terrors of ignorance hold their undisputed and remorseless reign.

Sermon 9, as translated in The Reading and Preaching of the Scriptures in the Worship of the Christian Church (1999) by Hughes Oliphant Old, Ch. 9: The German Mystics, p. 449

The Superstition of Divorce (1920)
Context: I do not ask them to assume the worth of my creed or any creed; and I could wish they did not so often ask me to assume the worth of their worthless, poisonous plutocratic modern society. But if it could be shown, as I think it can, that a long historical view and a patient political experience can at last accumulate solid scientific evidence of the vital need of such a vow, then I can conceive no more tremendous tribute than this, to any faith, which made a flaming affirmation from the darkest beginnings, of what the latest enlightenment can only slowly discover in the end.

Source: The Meaning of the City (1951), p. 10

Source: Leisure, the Basis of Culture (1948), Leisure, the Basis of Culture, pp. 33–34
The Kerenyi quote is from Karl Kerenyi, Die antike Religion (Amsterdam, 1940), p. 66.

The Essenes and the Kabbalah: Two Essays, p. 84

Sermon 9, as translated in The Reading and Preaching of the Scriptures in the Worship of the Christian Church (1999) by Hughes Oliphant Old, Ch. 9: The German Mystics, p. 449
Context: The authorities teach that next to the first emanation, which is the Son coming out of the Father, the angels are most like God. And it may well be true, for the soul at its highest is formed like God, but an angel gives a closer idea of Him. That is all an angel is: an idea of God. For this reason the angel was sent to the soul, so that the soul might be re-formed by it, to be the divine idea by which it was first conceived. Knowledge comes through likeness. And so because the soul may know everything, it is never at rest until it comes to the original idea, in which all things are one. And there it comes to rest in God.