“If what you have to say is important and/or difficult to follow, use the simplest language possible. If the reader doesn't get it then, let it not be your fault.”

Letter to Jules Siegel, published in Cavalier magazine (August 1965); republished in "Pynchon notes 15" and " "The World is at Fault" http://against-the-day.pynchonwiki.com/wiki/index.php?title=The_World_is_at_Fault at pynchonwiki.com http://pynchonwiki.com/
Context: When Marilyn Monroe got out of the game, I wrote something like, "Southern California's special horror notwithstanding, if the world offered nothing, nowhere to support or make bearable whatever her private grief was, then it is that world, and not she, that is at fault."
I wrote that in the first few shook-up minutes after hearing the bulletin sandwiched in between Don and Phil Everly and surrounded by all manner of whoops and whistles coming out of an audio signal generator, like you are apt to hear on the provincial radio these days. But I don't think I'd take those words back.
The world is at fault, not because it is inherently good or bad or anything but what it is, but because it doesn't prepare us in anything but body to get along with.
Our souls it leaves to whatever obsolescences, bigotries, theories of education workable and un, parental wisdom or lack of it, happen to get in its more or less Brownian (your phrase) pilgrimage between the cord-cutting ceremony and the time they slide you down the chute into the oven, while the guy on the Wurlitzer plays Aba Daba Honeymoon because you had once told somebody it was the nadir of all American expression; only they didn't know what nadir meant but it must be good because of the vehemence with which you expressed yourself.

A Conversation with Ward Cunningham (2003), The Simplest Thing that Could Possibly Work
Context: You are always taught to do as much as you can. Always put checks in. Always look for exceptions. Always handle the most general case. Always give the user the best advice. Always print a meaningful error message. Always this. Always that. You have so many things in the background that you're supposed to do, there's no room left to think. I say, forget all that and ask yourself, "What's the simplest thing that could possibly work?"
I think the advice got turned into a command: "Do the simplest thing that could possibly work." That's a little more confusing, because there isn't this notion that as soon as you've done it, we'll evaluate it.

Tantra: the Supreme Understanding (1984)

Rumi Daylight (1990)

How I Work (1993)

Part VI: Welcome to the Dollhouse, page 239.
Going Postal: Rage, Murder, and Rebellion, From Reagan's Workplaces to Clinton's Columbine and Beyond (2005)
Context: Cruel and callous when on top, afraid and smiling all the way to the grave when not- that pretty much sums up the post-Reagan zeitgeist. And if you're not just as cheerful as the rest, "you've got some personal problems." You're a weirdo if you complain. It's your own fault if you're traumatized by a massacre. It's your own fault if you're poor. It's your own fault if you get downsized, overworked, bullied, and fail. Get over it.

Original: Perdere le persone allontanatesi dalla vostra vita in un momento molto difficile, è il regalo più utile ed importante che potessero farvi.
Source: prevale.net

‘Truth’, Chapter I.
Friends in Council (First Series), (1847),