IEN (Internet Experiment Note) document: IEN 19 http://postel.org/ien/txt/ien19.txt, A note on Inter-Network Naming, Addressing, and Routing (January, 1982)
This quotation is often erroneously attributed to Jon Postel.
“You tell it that it's indicative by appending $!. That's why we made $! such a short variable name, after all.”
[199709081801.LAA20629@wall.org, 1997]
Usenet postings, 1997
Help us to complete the source, original and additional information
Larry Wall 294
American computer programmer and author, creator of Perl 1954Related quotes

RFC (Request for Comments) document: RFC 791 http://www.ietf.org/rfc/rfc0791.txt, Internet Protocol (September 1981)
This is often mistakenly attributed to Jon Postel, but it is actually a very slight variation on a quotation from John Shoch; both RFC-791 and its earlier version RFC-760 include, at the point in the text where this passage appears, a reference to Shoch's paper Inter-Network Naming, Addressing, and Routing, which is the original source of this observation.
Misattributed

"One Foot on the Gas, One Foot in the Grave" from "Somewhere in the Between" (2007) http://risc.perix.co.uk/lyrics/sm/sitb/04/

[199707300650.XAA05515@wall.org, 1997]
Usenet postings, 1997

On Tranquility of the Mind
Context: We are all chained to fortune: the chain of one is made of gold, and wide, while that of another is short and rusty. But what difference does it make? The same prison surrounds all of us, and even those who have bound others are bound themselves; unless perchance you think that a chain on the left side is lighter. Honors bind one man, wealth another; nobility oppresses some, humility others; some are held in subjection by an external power, while others obey the tyrant within; banishments keep some in one place, the priesthood others. All life is slavery. Therefore each one must accustom himself to his own condition and complain about it as little as possible, and lay hold of whatever good is to be found near him. Nothing is so bitter that a calm mind cannot find comfort in it. Small tablets, because of the writer's skill, have often served for many purposes, and a clever arrangement has often made a very narrow piece of land habitable. Apply reason to difficulties; harsh circumstances can be softened, narrow limits can be widened, and burdensome things can be made to press less severely on those who bear them cleverly.

"Natural History: The Forgotten Science" [1938]; Published in Round River, Luna B. Leopold (ed.), Oxford University Press, 1966, p. 62.
1930s