In your book, you had this phrase that stuck out to me, only the body and how it acts can change. And I'm wondering if you might say a little about that. What I'm focusing on largely and also intuitively, mostly focus on is the social level where we implement each other in a sort of a social way. The way we do this is always gestural, and it's always physical. Even when we speak to each other, it's a series of gestures,. Those are all physical gestures. And likewise, body language, those are all sort of physical gestures written into time and space in asort of material way.