The tai chi self is an extraordinary experiment in living. It perceives mind and body as one. It recognizes that we are solid stuff and also immaterial. To say it in tai chi terms, we are substantial and insubstantial. These are not dualities but complements, and you can play with them in a tai chi way. That is, you can let them interact and interlace, and allow them to set you in motion, as we say. Sometimes I am so enchanted by the workings of tai chi in my very bones that I become taller and lighter, and a sense of childlike happiness often fills me up.