I was trying to help explain to someone on IRC (yes, I know, I know) how HTML wasn’t “programming” while javascript was, and the best I could come up with was:

HTML is like bolting a wing onto your trunk lid. Javascript is like bolting a blower onto your motor. One is just decoration, and the other actually does something to your machine.

I amused myself, so I share it with you. Aren’t you so much happier now?