Got another riddle for you, and it's a toughy! Can you guess it?

[Jack Rabbit]

Sir. I bear a rhyme excelling
In mystic force and magic spelling
Celestial sprites elucidate
All my own striving cant relate


Try to answer this without cheating. If none of you can guess the answer I will pick the best guess as best answer and then reveal it.

 

[Lozza]

UM its talking about this riddle ?? and he doesnt get it

 

[Kathleen R]

omg!
i think i got it!
is it PI!? (3.14)
gee i hope it is.

 

[Aaron]

I suspect ABRACADABRA. (A rhyme excelling in mystic force and magic spelling; talismans were made with the letters A-B-R-A-C-A-D-A-B-R-A written forwards and backwards.) The last two lines seem ungrammatical, though, so there may be a code involved.

EDIT: Oh. Word lengths. Pi. Right. What on earth does that have to do with celestial sprites?