Most of us humans pretend our entire lives that we are something other than animals, and as a result we think our "animal nature" is something you can just ignore or somehow transcend — preferably while ignoring it. We enter the false dichotomy of "man or beast", when the truth is actually "man and beast." We are not one — we are two. And the one of us who thinks he's running things is really just a recent software upgrade that runs atop a highly sophisticated operating system that's already had millions of years of performance tuning — and can run just fine without you.
The Multiple Self (dirtSimple.org). I first read this a few months ago. I'm still not sure exactly what it means, but I'm sure it's important.