“May your first day in hell last ten thousand years, and may it be the shortest.”

Down and Out in the Magic Kingdom (2003)

On Revolutionary Medicine (1960)

Song 20: "Against Idleness and Mischief".
1710s, Divine Songs Attempted in the Easy Language of Children (1715)

At the Battle of Copenhagen (2 April 1801) [citation needed]
1800s

Ch 6
A Canticle for Leibowitz (1959), Fiat Homo
Context: The monks of the earliest days had not counted on the human ability to generate a new cultural inheritance in a couple of generations if an old one is utterly destroyed, to generate it by virtue of lawgivers and prophets, geniuses or maniacs; through a Moses, or through a Hitler, or an ignorant but tyrannical grandfather, a cultural inheritance may be acquired between dusk and dawn, and many have been so acquired. But the new "culture" was an inheritance of darkness, wherein "simpleton" meant the same thing as "citizen" meant the same thing as "slave." The monks waited. It mattered not at all to them that the knowledge they saved was useless, that much of it was not really knowledge now, was as inscrutable to the monks in some instances as it would be to an illiterate wild-boy from the hills; this knowledge was empty of content, its subject matter long since gone. Still, such knowledge had a symbolic structure that was peculiar to itself, and at least the symbol-interplay could be observed. To observe the way a knowledge-system is knit together is to learn at least a minimum knowledge-of-knowledge, until someday — someday, or some century — an Integrator would come, and things would be fitted together again. So time mattered not at all. The Memorabilia was there, and it was given to them by duty to preserve, and preserve it they would if the darkness in the world lasted ten more centuries, or even ten thousand years...

These lines were not written by Newton. They have often been accreted to various hymns, including "Amazing Grace", since the mid-nineteenth century.
Misattributed

From the lyrics of his song Vida Louca, Vida (Life, Crazy Life)