Tomorrow I'm lecturing on Plato and psychology. (I'm having the kids read Jonathan Haidt, whom I quote in the book, in the Meno intro chapter.) Anyway, Haidt quotes Plato's famous metaphor, from Phaedrus (246a - 254e). The soul is like a charioteer having a bit of trouble. The horse on the right is noble and white. The dark, shaggy one, on the left, is deaf as a post and yields only to the whip. These correspond to the honor-loving and appetitive parts of the soul, respectively. The charioteer is, of course, reason. And there are (sort of) a couple versions of the myth, so maybe the horses have wings.
I've been meaning to make an illustration to go with this one for a while and I finally got around to it tonight. I think it turned out alright.