I love it when I find out that things that I think I know, are things that I don't really, really know. It happens often. It happens especially when we are talking about those deep, primal, fundamental things. I realize I make lots of assumptions. Most of my knowledge is partial, fungible, and open to revision. It doesn't exactly make me feel stupid, although, maybe it should. Let's just say I'm a seeker after knowledge, and knowledge is always running out ahead of me, waiting for me to catch up.
How about "reality?" Physicist David Bohm tells us reality is not as simple as we think it is...
"Reality is what we take to be true. What we take to be true is what we believe. What we believe is based on our perceptions. What we perceive depends on what we look for. What we look for depends on what we think. What we think depends on what we perceive. What we perceive determines what we believe. What we believe determines what we take to be true. What we take to be true is our reality."
So I guess it isn't all that surprising that human beings are often in conflict. And that conflict is not just of ideologies, but actually and really a conflict of realities.