She said faintly, Are you... real?
Amusement showed in his face. Real? he said. Define reality and I can answer you. He waved a hand. Look into solid earth, into rock, and see the galaxies of all Creation. What you call reality melts; there is a whirling, a spinning of forces, a dance of motes and atoms. Some of them we call planets, one of them is Earth. Nothingness within nothingness enclosing nothing, that is reality. Tell me what you want, and I can answer.
Fourth measure Lords and Ladies (p. 170) - Pavane (1968)