"A mind not to be changed by place or time.
The mind is its own place, and in itself
Can make a heav'n of hell, a hell of heav'n."
Lines 253-55. Book I. See also Book IV, line 75
#OTD in 1667.
Blind and impoverished, John Milton sells Paradise Lost to a printer for £10, so that it could be entered into the Stationers' Register.
Paradise Lost at PG:
https://www.gutenberg.org/ebooks/26