The Importance of Mind and Matter

Descartes argued that mind and matter are two radically different kinds of things. Mind is a completely immaterial substance. Matter, of course, is a completely material substance. But how can it do that? Mind has no energy. It doesn't take up space. Right? What about the reverse? Can matter ever cause mind? Here we go. Behold, I'm going to start with a completely material event. And it's going to end up in a completely mental event. Ow. Two pieces of matter slam into each other. The end result is pain. How much does pain weigh? Does it even make sense of what color is it? What's its electromagnetic radiation? What