Changes and Non-Changes

As we grow up, things change.  Our bodies, our circles of friends, the size and makeup of our families, our levels of responsibility.  What I'm wondering about and contemplating is this: What about our souls?  Do they change a lot?  A little?  At all?  What do you think?  My personal opinion is that they change a little or hardly at all.  Yeah, they may be covered up and reined in and quieted by our adult minds and egos, but they're there.  We're all children, way down deep.  Some deeper than others.  Why else would some people become whiny, needy, insecure messes when ill or frightened?  Why else would we develop insaciable, wide-eyed fascinations with certain subjects?  How else would authors have the imagination to create such lovable and enduring characters?  There isn't much "inner" about my inner child.  I'll admit that.  It's either on my shoulders or sitting next to me most of the time.  It doesn't much like staying in, and it comes out to make me look like a fool more often than not.  But, without it, I wouldn't even have the capacity to be a fool.  Isn't that part of the fun of life, the ability to be a fool once in a while (or more often, if you'd like)?