“Description begins in the writer’s imagination, but should finish in the reader’s.”

90th Birthday Reflections (2007)
Context: I'm sometimes asked how I would like to be remembered. I've had a diverse career as a writer, underwater explorer, space promoter and science populariser. Of all these, I want to be remembered most as a writer — one who entertained readers, and, hopefully, stretched their imagination as well.

IRE Transactions on Information Theory (1956), volume 2, issue 1, page 3. * The Bandwagon
Shannon
Claude E.
2
1
1956
March
10.1109/TIT.1956.1056774.

Nobel Prize Lecture (1993)
Context: The vitality of language lies in its ability to limn the actual, imagined and possible lives of its speakers, readers, writers. Although its poise is sometimes in displacing experience it is not a substitute for it. It arcs toward the place where meaning may lie. When a President of the United States thought about the graveyard his country had become, and said, "The world will little note nor long remember what we say here. But it will never forget what they did here," his simple words are exhilarating in their life-sustaining properties because they refused to encapsulate the reality of 600, 000 dead men in a cataclysmic race war. Refusing to monumentalize, disdaining the "final word", the precise "summing up", acknowledging their "poor power to add or detract", his words signal deference to the uncapturability of the life it mourns.

The Figure a Poem Makes (1939)

The Figure a Poem Makes (1939)
Variant: The ear is the only true writer and the only true reader.
Source: Collected Poems of Robert Frost

Source: Flaubert's Parrot

Paul Gillin, ‎Geoffrey A. Moore (2009), The New Influencers: A Marketer's Guide to the New Social Media. p. vii

As quoted in The New York Times (2 July 1978)