Lambda the Ultimate

Years ago I read a quote regarding non-local effects in programming which said something along the lines of:

Writing a computer program is like building a skyscraper where, if the fit of the door to the janitors cupboard in the basement is wrong, the whole building could collapse.

(of course, that only applies if you're using a language which allows non-local effects :-)

I've been struggling to locate the reference, though - does it ring any bells for anyone here? Failing that, can anyone point me at a similar quote?

Thanks in advance!

Paul.