“Imagine a book of unexplained mysteries written by a contemporary of Shakespeare. It might include the mystery of the falling stars that sweep through the sky foretelling disaster; the mystery of the Kraken, the giant sea devil with 50-foot tentacles; the mystery of monster bones, sometimes found in caves or on beaches. Such a book would be a curious mixture of truth and absurdity, fact and legend. We would all feel superior as we turned its pages and murmured: "Of course, they didn't know about comets and giant squids and dinosaurs." If this book should happen to find its way into the hands of our remote descendants, they may smile pityingly and say: "It's incredible to think that they knew nothing about epsilon fields or multiple psychic feedback or cross gravitational energies. They didn't even know about the ineluctability of time."”

Source: The End of Faith: Religion, Terror, and the Future of Reason

The Golden Goose Special (1997)

The Sea-Limits, reported in Bartlett's Familiar Quotations, 10th ed. (1919). Compare: "I send thee a shell from the ocean-beach; But listen thou well, for my shell hath speech. Hold to thine ear / And plain thou'lt hear / Tales of ships", Charles Henry Webb, With a Nantucket Shell; The hollow sea-shell, which for years hath stood / On dusty shelves, when held against the ear / Proclaims its stormy parent, and we hear / The faint, far murmur of the breaking flood. / We hear the sea. The Sea? It is the blood / In our own veins, impetuous and near", Eugene Lee-Hamilton, Sonnet. Sea-shell Murmurs'.

Writers on Writing interview (1986)

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.

Traits and Trials of Early Life (1836)

The Unspeakable McInch (p. 39; all ellipses in the original)
Short fiction, The Many Worlds of Magnus Ridolph (1966)

Speech to the British Association (6 August 1894), quoted in The Times (9 August 1894), p. 6
1890s