No, I remember seeing it in the Quote of the Day, and I have it written in my quote book as a Lewis quote. But I don't remember where I got it from.
The quote really ought to have italics or bold or something to put stress on the correct words. Like this:
You don't
have a Soul.
You
are a Soul.
You
have a Body.
So that it's understood that we are a soul which just happens to be attached to a body. Our body is not our primary part, not our main being, our core. It's only the shell in which we move about. Such a good quote.
Let me look around and see if I can find where I got it.
... Nope. I can't find it anywhere.