
Apart from Chapter 15, the focus now moves away from the nature of God to the nature of the world: how it is constructed, and how a person can disentangle himself/herself from it.
Chapter 13 deals with material nature (prakṛti) and how spirit (puruṣa) interacts
with it. First, Krishnaexplains the difference between the knower (ātman) and the
objective field which the knower experiences (13.6). The yogi can carefully examine
each element of the field and systematically detach himself/herself from it. True
knowledge is in fact knowledge of Brahman, and the person who truly knows and understands
this will achieve immortality (13.12-
Krishna then explains how Brahman interacts with material nature (13.15-