Sometimes you've just got to memorise that theorem, no matter that you can't figure out what it's about or what it all means. In that case: put a tune to it. It doesn't even have to fit it very well either.
If I were posting this anonymously, I'd say that you should turn it into something rude as you'd be guaranteed not to forget it. But I'm not posting this anonymously so I shan't. You didn't hear that from me. I wasn't here. Someone must've edited my post and put that in.