Your strange job as a performing artist—musician, actor, or dancer—is to immerse yourself completely in the work of art you’re performing—to lose yourself, in a sense—and yet at all times to remain aware of precisely what you’re doing and how you’re doing it. It’s not easy, and sometimes the process—which is complicated to begin with—becomes downright mysterious. I once heard the actress Helen Hayes tell a story about Sir Laurence Olivier. She was performing in a play with Olivier, and one night