“The old proverb was now made good, "the mountain had brought forth a mouse."”

Source: Ars Poetica, or The Epistle to the Pisones (c. 18 BC), Line 139. Horace is hereby poking fun at heroic labours producing meager results; his line is also an allusion to one of Æsop's fables, The Mountain in Labour. The title to Shakespeare's play Much Ado About Nothing expresses a similar sentiment.

Book IV, fable 23, line 1.
Fables

Protocols to the Experiments on Hashish, Opium and Mescaline http://www.wbenjamin.org/protocol1.html (1927-1934, English translation 1997)

Celtic Women in Music interview (1999)
Context: There is a wonderful old Chinese proverb that I love, "A good traveler has no fixed plans and is not intent on arriving". I think about my personal approach to musical projects much like a travel writer might approach the preparation for a book. You latch on to a certain theme or historical event and follow that into the unknown, while, at the same time, expanding on those themes.

"Alaska Glaciers: Graphic Description of the Yosemite of the Far Northwest", San Francisco Daily Evening Bulletin (part 5 of 11 part series "Notes of a Naturalist") dated 7 September 1879, published 27 September 1879; reprinted as "Baird Glacier" in Letters from Alaska, edited by Robert Engberg and Bruce Merrell (University of Wisconsin Press, 1993), pages 28-32 (at page 31); modified slightly and reprinted in Travels in Alaska http://www.sierraclub.org/john_muir_exhibit/writings/travels_in_alaska/ (1915), chapter 5, A Cruise in the Cassiar
First lines of the documentary film series " The National Parks: America's Best Idea http://www.pbs.org/nationalparks/" by Ken Burns.
1910s

Song A Windmill in Old Amsterdam

The Spirit of Love (1752) http://www.ccel.org/ccel/law/love/files/love1.htm.
Context: Now the Spirit of Love has this Original. God, as considered in himself in his Holy Being, before any thing is brought forth by him or out of him, is only an eternal Will to all Goodness. This is the one eternal immutable God, that from Eternity to Eternity changeth not, that can be neither more nor less nor any thing else but an eternal Will to all the Goodness that is in himself, and can come from him. The Creation of ever so many Worlds or Systems of Creatures adds nothing to, nor takes any thing from this immutable God. He always was and always will be the same immutable Will to all Goodness. So that as certainly as he is the Creator, so certainly is he the Blesser of every created Thing, and can give nothing but Blessing, Goodness, and Happiness from himself because he has in himself nothing else to give. It is much more possible for the Sun to give forth Darkness, than for God to do, or be, or give forth anything but Blessing and Goodness. Now this is the Ground and Original of the Spirit of Love in the Creature; it is and must be a Will to all Goodness, and you have not the Spirit of Love till you have this Will to all Goodness at all Times and on all Occasions. You may indeed do many Works of Love and delight in them, especially at such Times as they are not inconvenient to you, or contradictory to your State or Temper or Occurrences in Life. But the Spirit of Love is not in you till it is the Spirit of your Life, till you live freely, willingly, and universally according to it. For every Spirit acts with Freedom and Universality according to what it is. It needs no command to live its own Life, or be what it is, no more than you need bid Wrath be wrathful. And therefore when Love is the Spirit of your Life, it will have the Freedom and Universality of a Spirit; it will always live and work in Love, not because of This or That, Here or There, but because the Spirit of Love can only love, wherever it is or goes or whatever is done to it. As the Sparks know no Motion but that of flying upwards, whether it be in the Darkness of the Night or in the Light of the Day, so the Spirit of Love is always in the same Course; it knows no Difference of Time, Place, or Persons, but whether it gives or forgives, bears or forbears, it is equally doing its own delightful Work, equally blessed from itself. For the Spirit of Love, wherever it is, is its own Blessing and Happiness because it is the Truth and Reality of God in the Soul, and therefore is in the same Joy of Life and is the same Good to itself, everywhere and on every Occasion.

Dice il proverbio, ch'a trovar si vanno
Gli uomini spesso, e i monti fermi stanno.
Canto XXIII, stanza 1 (tr. B. Reynolds)
Orlando Furioso (1532)

Summer Evening.