So one relaxes the physical manifestations of our mental state, of mental activities. And certainly, we can feel that in breathing. We get excited, and the breathing gets maybe more shallow – or more chest breathing, rather than belly breathing – or faster. And then we relax more. We're not so excited. We calm down, and the breathing shifts and changes. The excitement that we feel in the breathing, that's expressed in the breathing, is called in Buddhism, "bodily formation." The word formation or construction, is what's been created, and what's come into play, by the state of the mind that we have.