From Peter Frost, of Evo and Proud something I've read about elsewhere: that we really do tend to think of someone as having a "warmer" personality if we are holding something warm, and that washing really does make us feel less guilty--Pilate was on to something.
This stimulates three thoughts. One: we always overestimate the influence of our thoughts in our decisions, and underestimate things we don't even perceive. Two: metaphor is woven into the very way we perceive the universe. It's not just a rhetorical technique. Three: knowing about this and taking it into account can help you control your environment to allow for more rational decisionmaking (that is, if that is your goal. It is mine.)
Frost thinks this means we are reusing neural pathways evolved for other purposes, which explains the seeming high heritability of complex and recently evolved behaviors. I think we've only just started moving toward an understanding of where our sense of the world really comes from.