Found it!!
I love to dig up past posts..
I was raised in a Christian culture, but I wasn't much of a believer.
But I've always been interested in reading about religion, spirituality, being open to things but not believing in something.
So lately, I decided to elect as my HP a force which is somehow within me (but isn't me !?!?)
Then I read a post on SR, I think it was by Rosalba (thanks 4 that by the way Ros) where she said you can think of your HP as your unconscious mind.
That made perfect sense to me, because the unconscious mind is separate from the ego (the I).
The only change I made to that definition is, my HP is the part of my subconscious mind that protects me and keeps me well (or tries to!).
Well, that's not exactly what you were asking Firesprite, but since I'm all excited about my new-found Higher Power, I thought I would share it with you all!