This may just confuse you more, but here's what inselpeter, of Troy and others had to say:

http://wordsmith.org/board/showthreaded.pl?Cat=&Board=miscellany&Number=22499&page=&view=&sb=&vc=1#Post22499

Alternatively, you could read 'Alice in Wonderland' (Carroll) and try to explain to us what you believe the grinning cat to be.