“Ah! Silence is golden. When I was in my observatory at Belle-croix, I dared not move as the silence opened to me a course of discoveries. The families of the wood were then in action. It was the silence that permitted me, immovable as a tree trunk, to see the deer in their hiding-place and at their toilet, to observe the habits of the field rat, of the otter, of the salamander, those fantastic amphibious animals. He who lives in the silence becomes the center of a world; a little more and I could imagine myself the sun of a small creation, if my studies had not recalled to me that I had so much trouble to reproduce a poor tree or a cluster of rushes.”

As the Swiss inscription says: Sprechen ist silbern, Schweigen ist golden
Bk. III, ch. 3.
1830s, Sartor Resartus (1833–1834)

Silence and Tact
The Note-Books of Samuel Butler (1912), Part XIV - Higgledy-Piggledy

Przysięgam, nie ma we mnie czarodziejstwa słów.
Mówię do ciebie milcząc, jak obłok czy drzewo.
"Dedication" (1945); quoted in Conversant Essays : Contemporary Poets on Poetry (1990) edited by James McCorkle, p. 69

Source: The Bell Jar (1963), Ch. 2

Vol. II, p. 30
1980s, Letters to the Schools (1981, 1985)
Context: Attention involves seeing and hearing. We hear not only with our ears but also we are sensitive to the tones, the voice, to the implication of words, to hear without interference, to capture instantly the depth of a sound. Sound plays an extraordinary part in our lives: the sound of thunder, a flute playing in the distance, the unheard sound of the universe; the sound of silence, the sound of one’s own heart beating; the sound of a bird and the noise of a man walking on the pavement; the waterfall. The universe is filled with sound. This sound has its own silence; all living things are involved in this sound of silence. To be attentive is to hear this silence and move with it.

Ibid., p. 60
The Book of Disquiet
Original: Paso tempos, passo silêncios, mudos sem forma passam por mim.

[Blake Lewis' profile, http://myspace.com/blakelewis, 2007-06-04, MySpace]
["What Are You Doing This Weekend?: Bshorty Farewell Party with KJ Sawka + Ra Scion + Joe Doria", http://www.seattleweekly.com/music/blogs/reverb/what_are_you_doing_this_weekend/, 2007-06-04, January 26, 2007, Seattle Weekly, Aja Pecknold]
On music

A response to the Nazi book burnings, in "To Posterity" (1939) as translated by H. R. Hays (1947)
Context: Do not treat me in this fashion. Don't leave me out. Have I not
Always spoken the truth in my books? And now
You treat me like a liar! I order you:
Burn me!
Those who lead the country into the abyss
Call ruling too difficult
For ordinary men.
Ah, what an age it is
When to speak of trees is almost a crime
For it is a kind of silence about injustice!

Letter to his fiancée Lee, (31 July 1978), published in Gerald Durrell: An Authorized Biography by Douglas Botting (1999)
Context: I have seen a thousand sunsets and sunrises, on land where it floods forest and mountains with honey coloured light, at sea where it rises and sets like a blood orange in a multicoloured nest of cloud, slipping in and out of the vast ocean. I have seen a thousand moons: harvest moons like gold coins, winter moons as white as ice chips, new moons like baby swans’ feathers.
I have seen seas as smooth as if painted, coloured like shot silk or blue as a kingfisher or transparent as glass or black and crumpled with foam, moving ponderously and murderously. … I have known silence: the cold earthy silence at the bottom of a newly dug well; the implacable stony silence of a deep cave; the hot, drugged midday silence when everything is hypnotised and stilled into silence by the eye of the sun; the silence when great music ends.
I have heard summer cicadas cry so that the sound seems stitched into your bones. … I have seen hummingbirds flashing like opals round a tree of scarlet blooms, humming like a top. I have seen flying fish, skittering like quicksilver across the blue waves, drawing silver lines on the surface with their tails. I have seen Spoonbills fling home to roost like a scarlet banner across the sky. I have seen Whales, black as tar, cushioned on a cornflower blue sea, creating a Versailles of fountain with their breath. I have watched butterflies emerge and sit, trembling, while the sun irons their winds smooth. I have watched Tigers, like flames, mating in the long grass. I have been dive-bombed by an angry Raven, black and glossy as the Devil’s hoof. I have lain in water warm as milk, soft as silk, while around me played a host of Dolphins. I have met a thousand animals and seen a thousand wonderful things… but —
All this I did without you. This was my loss.
All this I want to do with you. This will be my gain.
All this I would gladly have forgone for the sake of one minute of your company, for your laugh, your voice, your eyes, hair, lips, body, and above all for your sweet, ever surprising mind which is an enchanting quarry in which it is my privilege to delve.