For most of us, the fundamental supposition of modern posture practice is that what we’re doing is more than just exercise or physical therapy, that it is something deeply meaningful and perhaps spiritual. I know when I practice, I’m a better person because of it. But what exactly is going on? To help organize my thoughts, I’ve turned again to the books on my shelf to discover what other teachers and scholars have to say about it. This is an admittedly limited and biased towards the modern survey, but a beginning into insight.