18 chapters of Gita are divided into 3 parts.
1. First 6 chapters - Aham. How I need to prepare myself?
2. Second 6 chapters - Brahmam. What are the qualities of
the supreme soul?
3. Third 6 chapters - Asmi. What are the blocks which are
stopping me to become that and how to overcome those?
To explain more -
I) The first 6 chapters- Aham - l
Chapter 1 - Arjuna vishadam - Confused, disturbed, depressed and frustrated
mind
Chapter 2 - Sankhyam - fundamental knowledge of living and
non-living beings.
Chapter 3 - Karma yoga - Seva or service without expecting
the results of the actions. (This is to handle the 5th layer, the memory)
Chapter 4 - Gnana Karma sanyasam - The knowledge which
helps to overcome the expectations from our actions. (This is to handle the 4th
layer, intellect)
Chapter 5 - Sanyasam - Leaving too much of actions or
sacrificing the results of the actions.
Chapter 6 - Dhyanam - Preparation of body, breath and Mind
for peace and rest. (Kriya yoga - yoga, pranayama and meditation for the first
3 layers)
II) The second 6 chapters -Brahmam- That
Chapter 7 - gnana vignanam - The knowledge of science to
know the highest.
Chapter 8 - Aksharam - The non-changing.
Chapter 9 - Rajavidhaya Rajaguhyam - The great secret
Chapter 10 - Vibhuti - omnipresent
Chapter 11 - Vishvarupam - Knows everything
Chapter 12 - Bhakti - worshiping that (to handle the 6th
layer, ego)
III) The third 6 chapters - Asmi - to become that
Chapter 13 - kshetra kshetragna - difference of body and
the soul
Chapter 14 - Gunatrayam - differences among the 3 gunas
Chapter 15 - Purushothamam - The supreme soul and jeevatma
Chapter 16 - Deivaasura sampath - Divine and demon
differences
Chapter 17 - Shradha trayam - three types of Beliefs or
faiths
Chapter 18 - Moksha sanyasam - Surrender and mukti (7th layer the soul)