Trying to explain the concept of a soul to a visitor from a different universe, the author of both Julia and Gideon writes:

Subject: Re: IC: Wolves Glen Pub
From: Geoffrey Brent (g.brent(AT)student.unsw.edu.NOS.PAM.au)
Date: 05/25/2001 10:28 AM Eastern Daylight Time
Message-id: <3B0E6C17.8C867561(AT)student.unsw.edu.NOS.PAM.au>

The Grouchybeast wrote:
> >"It's a metaphysical concept, though that probably
> >doesn't help; the idea is that besides the physical
> >body, living creatures have some sort of intangible
> >existence.
>
> "You mean, like ghosts?"

"Sort of. I guess you could say a ghost is a soul
that's lost its body."

Julia, Lasombra
 - or in Gideon's case, its mind.