The Capacity of Voluntary Control

We have all been living in a theory of the universe in which the individual is simply involved in something that happens to him. Every single one of us knows that that isn't true, he says. Only you can't admit it just in the same way as you're responsible for the way your own heart beats. You say, well, come on, aren't you human? Don't you know how to open and close your hand? Just do it, silly."