Mark Twain (1835-1910) American Writer

"Nothing exists. All is a dream.

God—man—the world—the sun, the moon, the wilderness

of stars—a dream, all a dream; they have no existence.

Nothing exists save empty space—And you.… 

And you are not you—you have no body, no blood, no

bones, you are but a thought."

—Mark Twain, 'The Mysterious Stranger'

You can download and read the story that this quote came from here, for free: https://www.gutenberg.org/files/3186/3186-h/3186-h.htm