Not to sound all woo woo, but the more I live and breathe the more I see how most, if not all things have a balancing point. Kind of like a knife blade when it's tempered, forged, and honed just so.
I like the phrase 'cooperative dynamic balance'. :)
I more then concur with the analogy you've made between emotions vs logic & science vs spirituality!
Darkness and light are just two little points, when there is an infinity of shades of grey in the spaces in between.