One's whole sense of passion and of drive belongs to the self, to the ego, even when it's very positive or for the benefit of all beings. It's very hard to convey what moves you when all of that is gone. It comes from a place that is very, very simple. In the Zen tradition, they say, when you're hungry you eat, and when you're tired you sleep. That doesn't sound very exciting, but it's pointing to the simplicity of a life no longer driven by the inner forces of desire and aversion—by wanting to accomplish, or to escape, or even to convey something.