When a chemist puts water in a test tube and adds salt, an angel comes along and dissolves the salt into charged particles called ions. Because we perceive the universe to be self-governing according to internally consistent and comprehensible principles, the angel in this story seems completely superfluous to us. We therefore cut it away with Occam’s razor.

I know this is old, but if you have never listened to it then do yourself a favor and listen now!