And then there is the famous Buddhist idea that the self—you know, your self, my self—is an illusion. In this view, the “you” that you think of as thinking your thoughts, feeling your feelings, and making your decisions doesn’t really exist.I If you put these two fundamental Buddhist ideas together—the idea of not-self and the idea of emptiness—you have a radical proposition: neither the world inside you nor the world outside you is anything like it seems.