“A bizarrerie of fires, cunabulum of light, it moved with a deft, almost dainty deliberation, phasing into and out of existence like a storm-shot piece of evening; or perhaps the darkness between the flares was more akin to its truest nature — swirl of black ashes assembled in prancing cadence to the lowing note of desert wind down the arroyo behind buildings as empty yet filled as the pages of unread books or stillnesses between the notes of a song.”

Optimism
Poetry quotes, Poems of Pleasure (1900)

As quoted in Turning Numbers into Knowledge: Mastering the Art of Problem Solving (2001) by Jonathan G. Koomey, p. 96; since at least 2010 similar statements are also sometimes attributed to Mozart, and a similar remark, apparently one of Ben Jonson, is quoted in "Notes to Cynthia's Revels, in The Works of Ben Jonson: With Notes Critical and Explanatory, and a Biographical Memoir (1875), edited by William Gifford, Vol. 2, in notes to p. 223, on p. 551: Division, in music, is "the space between the notes of music, or the dividing of the tones."
Unsourced variants:
Music is the silence between the notes.
The music is not in the notes, but in the silence between.
The music is not in the notes, but in the silence between them.
Variant: Music is the space between the notes.

Source: Lolita

Source: Inkspell

Lalla Rookh http://www.columbia.edu/itc/mealac/pritchett/00generallinks/lallarookh/index.html (1817), Part IX: The Light of the Harem

"A Welsh Testament"
Tares (1961)
Context: Even God had a Welsh name:
He spoke to him in the old language;
He was to have a peculiar care
For the Welsh people. History showed us
He was too big to be nailed to the wall
Of a stone chapel, yet still we crammed him
Between the boards of a black book.

Forge of Darkness (2013)