“Successfully (whatever that may mean) or unsuccessfully, we all overact the part of our favorite character in fiction.”

Vol. 4, pt. 2, translated by W.P.Dickson.
The History of Rome - Volume 4: Part 2

Source: Wishful Drinking

Chin Wag At The Slaughterhouse (2013)
Context: Characters in novels are all fiction like the world they live in. Of course Vivien Lash has things in common with me but if she actually was me I wouldn’t have been able to invent her. And I’m not plotting to murder my husband!
The closest connection between me and my characters is that we live in a city that’s recognisable as London, but it’s a version of London that came out of my head.

Quoted in Mickey Pearlman, Listen to Their Voices (1993), ch. 12

Source: Dictionary of Burning Words of Brilliant Writers (1895), P. 45.

Interview with Weird Tales (24 May 2007) http://weirdtales.net/wordpress/2007/05/24/george-rr-martin-on-magic-vs-science/
Context: I think that for science fiction, fantasy, and even horror to some extent, the differences are skin-deep. I know there are elements in the field, particularly in science fiction, who feel that the differences are very profound, but I do not agree with that analysis. I think for me it is a matter of the furnishings. An elf or an alien may in some ways fulfill the same function, as a literary trope. It’s almost a matter of flavor. The ice cream can be chocolate or it can be strawberry, but it’s still ice cream. The real difference, to my mind, is between romantic fiction, which all these genres are a part of, and mimetic fiction, or naturalistic fiction.

The Paris Review interview (1982)
Context: You know C. S. Lewis, whom I greatly admire, said there’s no such thing as creative writing. I’ve always agreed with that and always refuse to teach it when given the opportunity. He said there is, in fact, only one Creator and we mix. That’s our function, to mix the elements He has given us. See how wonderfully anonymous that leaves us? You can’t say, “I did this; this gross matrix of flesh and blood and sinews and nerves did this.” What nonsense! I’m given these things to make a pattern out of. Something gave it to me.
I’ve always loved the idea of the craftsman, the anonymous man. For instance, I’ve always wanted my books to be called the work of Anon, because Anon is my favorite literary character. If you look through an anthology of poems that go from the far past into the present time, you’ll see that all the poems signed “Anon” have a very specific flavor that is one flavor all the way through the centuries. I think, perhaps arrogantly, of myself as “Anon.” I would like to think that Mary Poppins and the other books could be called back to make that change. But I suppose it’s too late for that.

Sec. 624, as translated by Tobias Dantzig in Number, the Language of Science. Fourth edition, New York: Doubleday 1954, p 141. See discussion of this entry for details.
The Will to Power (1888)

On Writing (2002)