Some people, when confronted with a problem, think
"I know, I'll use regular expressions." Now they have two problems.
--usually attributed to jwz in comp.lang.emacs
I had seen jwz's quote a few times, it's a very clever, and in the past week as I've been playing with a particularly nasty regex in Erlang I keep muttering to myself variations—"now I have nine problems" for example.
In his post he tracks down the original quote and possible origins. Apparently it was recently on Reddit, and jwz himself makes an appearance in the comments.