Galen explicitly characterizes UP as a hymn to the divine creator (XVII.2–3, 732–33). This, of course, is not religion in any conventional sense: rather, it is the fact that one has gained detailed, in-depth knowledge, both of anatomy and of the chreia of the parts revealed in anatomy—that is, of the close, detailed relationship between their their structure and their functional purpose—that enables one to celebrate the creator appropriately.