“Truth becomes fiction when the fiction's true;
Real becomes not-real when the unreal's real.”
Jia zuo zhen shi zhen yi jia,
Wu wei you chu you huan wu.
Source: Dream of the Red Chamber (c. 1760), Chapter 5
Original
假作真时真亦假,无为有处有还无。
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Cao Xueqin 11
Chinese writer during the Qing dynasty 1724–1763Related quotes

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.

“Science fiction is for real, space opera is for fun.”

“To find the real,
To be stripped of every fiction except one,”
Notes Toward a Supreme Fiction (1942), It Must Give Pleasure
Context: p>But to impose is not
To discover. To discover an order as of
A season, to discover summer and know it, To discover winter and know it well, to find
Not to impose, not to have reasoned at all,
Out of nothing to have come on major weather,It is possible, possible, possible. It must
Be possible. It must be that in time
The real will from its crude compoundings come,Seeming at first, a beast disgorged, unlike,
Warmed by a desperate milk. To find the real,
To be stripped of every fiction except one,The fiction of an absolute — Angel,
Be silent in your luminous cloud and hear
The luminous melody of proper sound.

“Good fiction is made of that which is real, and reality is difficult to come by.”
Shadow and Act (New York: Random House, 1964), Introduction, p. xix; in The Collected Essays, ed. John F. Callahan (New York: Modern Library, 1995), p. 56.

“The real plot in fiction parallels life in that it happens within the characters.”
Vanna Bonta Talks About Quantum fiction: Author Interview (2007)

Illusions : The Adventures of a Reluctant Messiah (1977)
Source: Illusions: The Adventures of a Reluctant Messiah