WHAT dire options from am'rous macros springs,
What mighty errors rise from a Trivial \special,
I sing--This Verse to Don Knuth, Muse! is due;
This, ev'n Carlisle may vouchsafe to view:
Slight is the markup, but not so the PDF,
If Frank inspire, and Chris approve my docstrip.
Say what strange catcodes, Fine! cou'd compel
A well-bred hacker t'assault a gentle LaTEX?
Oh say what stranger keyword value, yet unprogramm'd,
Cou'd make CTAN reject a non-free package ?
And dwells such power in active characters then?
And do XML and XSL excite so much?
--stolen by Sebastian Rahtz