“Yes, I believe in prayer, as a mystery which can endow one with more power perhaps than any other spiritual mystery, yet a mystery that cannot be exposited to a point where it is not a mystery.”

"Mysteries" (1960), st. 10; Dimitri Obolensky (ed.) The Heritage of Russian Verse (Bloomington: Indiana University Press, 1976) p. 452.

Source: Morals and Dogma of the Ancient and Accepted Scottish Rite of Freemasonry (1871), Ch. I : Apprentice, The Twelve-Inch Rule and Common Gavel, p. 1
Context: Though Masonry neither usurps the place of, nor apes religion, prayer is an essential part of our ceremonies. It is the aspiration of the soul toward the Absolute and Infinite Intelligence, which is the One Supreme Deity, most feebly and misunderstandingly characterized as an "architect." Certain faculties of man are directed toward the Unknown — thought, meditation, prayer. The unknown is an ocean, of which conscience is the compass. Thought, meditation, prayer, are the great mysterious pointings of the needle. It is a spiritual magnetism that thus connects the human soul with the Deity. These majestic irradiations of the soul pierce through the shadow toward the light.
It is but a shallow scoff to say that prayer is absurd, because it is not possible for us, by means of it, to persuade God to change His plans. He produces foreknown and foreintended effects, by the instrumentality of the forces of nature, all of which are His forces. Our own are part of these. Our free agency and our will are forces. We do not absurdly cease to make efforts to attain wealth or happiness, prolong life, and continue health, because we cannot by any effort change what is predestined. If the effort also is predestined, it is not the less our effort, made of our free will.

Source: Dictionary of Burning Words of Brilliant Writers (1895), P. 421.

le mystère de l'amour est plus grand que le mystère de la mort.
Source: Salomé (1893)

A Vindication of Natural Society (1756)
Context: A good parson once said, that where mystery begins, religion ends. Cannot I say, as truly at least, of human laws, that where mystery begins, justice ends? It is hard to say whether the doctors of law or divinity have made the greater advances in the lucrative business of mystery. The lawyers, as well as the theologians, have erected another reason besides natural reason; and the result has been, another justice besides natural justice. They have so bewildered the world and themselves in unmeaning forms and ceremonies, and so perplexed the plainest matters with metaphysical jargon, that it carries the highest danger to a man out of that profession, to make the least step without their advice and assistance. Thus, by confining to themselves the knowledge of the foundation of all men's lives and properties, they have reduced all mankind into the most abject and servile dependence. We are tenants at the will of these gentlemen for everything; and a metaphysical quibble is to decide whether the greatest villain breathing shall meet his deserts, or escape with impunity, or whether the best man in the society shall not be reduced to the lowest and most despicable condition it affords. In a word, my Lord, the injustice, delay, puerility, false refinement, and affected mystery of the law are such, that many who live under it come to admire and envy the expedition, simplicity, and equality of arbitrary judgments.

Commenting upon the Aleinu prayer, in "Why We Remain Jews" (1962)
Context: The kingdom is Yours, and You will reign in glory for all eternity. As it is written in Your Torah: "The Lord shall reign for ever and ever." And it is said: " And the Lord shall be King over all the earth: on that day the Lord shall be One, and His name One."
No nobler dream was ever dreamt. It is surely nobler to be a victim of the most noble dream than to profit from a sordid reality and to wallow in it. Dream is akin to aspiration. And aspiration is a kind of divination of an enigmatic vision. And an enigmatic vision in the emphatic sense is the perception of the ultimate mystery, of the truth of the ultimate mystery. The truth of the ultimate mystery — the truth that there is an ultimate mystery, that being is radically mysterious — cannot be denied even by the unbelieving Jew of our age. That unbelieving Jew of our age, if he has any education, is ordinarily a positivist, a believer in Science, if not a positivist without any education.

Sir Harry Johnston Liberia (1906), vol. 1, p. 257.
Criticism of The Martyrdom of Man

Movieline, April 1997