I italicized "soul" in an attempt to indicate that I meant it as a symbol. I thought the context made it clear, so I was comfortable using it as a shortcut, but perhaps I miscalculated.
I meant the soul as part of you that is balanced, at peace, has perspective of where you fit within things, is aligned with a greater good - as opposed to a self-injuring sense of self-importance.
It's not an easy thing to summarize or pin down, and it's kind of different for everyone.