Chapter one sets the scene and some of the causes of the battle of Kurukshetra. Chapter two brings a summary of all the topics .

Things like prescribed duties and trancendental duties , their interactions and their complementary nature, as well as the therapeutic benefits

The peripheral and the cor purposes of Divine life are summarised in this second chapter.

In Bhagavad Gita, in Chapter three and four, the reasons for Lord Krishna’s appearance as well as the progressive nature of all types of duties and sacrifices are discussed. These culminate , when performed correctly  under the instructions of the Vedas and saintly persons , to Knowledge of Krishna . Krishna is unlimited, and the different expansions of His unlimited personality are discussed in the fourth chapter of the Bhagavad Gita personally by Krishna to Arjuna. ..

The fifth chapter explains that persons acquiring knowledge through an intellectual endeavour to understand God or those that act purely within their duties in honest and respect ways towards mankind and all creatures are both on the same path .This is  because the sincerity of purpose to act religiously or piously or to seek God by inner searching are both pleasing to God . When pure and exclusive devotion is added to any of these proccess, Divinity begins to be understood much more deeply.
Thus, jnana yoga or karma yoga are one and the same when correctly initiated under the guidance of the Vedas and saints .

The sixth chapter describes the path of mystic yoga, but Krishna has also summarised the general qualities of all the yoga paths . Those that bring one to the point of seeing the true equality of all beings and further seeing clearly that everything and every person are situated within the universal form of God are superior. As the yogi advances further , Krishna explains in the 6th chapter that one can also understand God  within his own heart and take inspiration from Him directly.
Ultimately , the successful yogi can enter the spiritual planets and personally associate with Krishna in one of the many abodes therein , and accordingly , different relationships are experienced as each individual might desire .
Importantly, Krishna says any endeavour for yoga and communication with God is never lost , even if not completed or perfected . Next life, it automatically begins again ..

In chapter seven, Lord Krishna brings a scientific explanation in a summary form of this material world , both the metaphysical and physical world is touched upon . Later in the Bhagavad, Gita Krishna will elaborate much further on all these maters as well as cosmological affairs.
Krishna, in chapter seven, also details the complexities of varieties of psychological conditioning of the living beings and the effects these material conditions have on a consciousness, including the individual choices that are made . It should be clear free will , determinism, and the responsive universe is at the heart of the Bhagavad Gita. In chapter eight, the all pervasiveness of Divinity , i.e., how He is situated both within and outside the universe, are discused . Further and more detailed explanations of destinations of different persons who practice mystic yoga are here . Easy journeys to other planets according to the situation of the cosmological position of particular stars at death  determine destinations . The all-around responsive universe means Krishna and His multifarious energies are in full control ..

In Bhagavad Gita Chapter nine, extensive knowledge of Krishna’s Godhood is given , in one sense, God is everything . Explanations of how He is nearby but far away , He is inside but outside, He is everywhere, but nowhere, for instance, are delineated .  Further discusion is also given about how He helps those that want to know Him , many arrangements are detailed of how that takes place .
Some people , it is mentioned in this chapter want other opulences in life and do not want a specific relationship at a  present yime with Krishna , so details of other destinations for those who worship ancestors of demigods are delineated. .

Further details of the rest of the Bhagavad Gita shortly.
http://www.thevedicspectator.com

---