Every time I hear "Rest in Peace" my mind corrects with "...except not resting or at peace". Does anyone have a secular, naturalistic world view analogue? Like "whom we should remember with honor", but catchy.
He has entered the Off-State.
Which I prefer over superstitions about ordering dead people to "rest in peace," because brain preservationists want to turn death from a permanent off-state into a temporary and reversible off-state.
Seriously, think about the traditional expression. We use the imperative tense of the verb "to rest," and it sounds like a spell one of our shamanistic ancestors came up with to keep ghosts from bothering the living.
http://www.ietf.org/mail-archive/web/ietf/current/msg80472.html
Prominently mentioned in
http://lesswrong.com/lw/w8/engelbart_insufficiently_recursive/