One of the questions I'm asking myself from my work is the question I've always been asking myself: how is it going to be useful? I have an idea for how the kind of work I do could be useful, but I'm not at all sure this is possible, or possible in my lifetime. The idea has a big version and a little version. The big version has to do with self-knowledge and understanding ourselves. The big idea is that neuroscience is a kind of self-knowledge. It's a way of understanding our minds and our behaviors. If we get it right, if we really come to understand our brains, we will understand ourselves, we will be better at predicting our behaviors in contexts and in ways that really matter. In trying to run a society, you need to know how the elements of it would work, just as much as to run a machine you need to know how the physical elements work.