“In the end all books are written for your friends. The problem after writing One Hundred Years of Solitude was that now I no longer know whom of the millions of readers I am writing for; this upsets and inhibits me. It's like a million eyes are looking at you and you don't really know what they think.”

Truth, Power, Self : An Interview with Michel Foucault (25 October 1982)

Fiction, "The Fifth Head of Cerberus", Orbit 10 (1972)

Source: A Moveable Feast

On her obsession with writing in “Jamaica Kincaid: Does Truth Have a Tone?” https://www.guernicamag.com/does-truth-have-a-tone/ in Guernica (2013 Jun 17)

On how writers should avoid analyzing their own work in “Donna Tartt on The Goldfinch, Inspiration, and the Perils of Literary Fame” https://www.townandcountrymag.com/leisure/arts-and-culture/a29022016/donna-tartt-goldfinch-interview/ in Town & Country (2019 Sep 12)

The Expanding Universe (1963)
Context: I heard a famous author say once that the hardest part of writing a book was making yourself sit down at the typewriter. I know what he meant. Unless a writer works constantly to improve and refine the tools of his trade they will be useless instruments if and when the moment of inspiration, of revelation, does come. This is the moment when a writer is spoken through, the moment that a writer must accept with gratitude and humility, and then attempt, as best he can, to communicate to others.
A writer of fantasy, fairly tale, or myth must inevitably discover that he is not writing out of his own knowledge or experience, but out of something both deeper and wider. I think that fantasy must possess the author and simply use him. I know that this is true of A Wrinkle in Time. I can’t possibly tell you how I came to write it. It was simply a book I had to write. I had no choice. And it was only after it was written that I realized what some of it meant.
Very few children have any problem with the world of the imagination; it’s their own world, the world of their daily life, and it’s our loss that so many of us grow out of it.

On how he would like to be remembered (1994)
Context: Oh, I don't know — that's a hell of a question — I don't tend to look at my stuff that way. I just look at it a book at a time. Something like the Amber books are in a different class. I try not to anticipate. I don't know what I'll be writing a few years from now. I have some ideas — I have lots of different things I want to try. I almost don't really care what history thinks. I like the way I'm being treated right now.

Lecture (1960); printed in her collection, Come Along with Me (1968)