On the next pages you will find "The Contents of the Bhagavad Gita Summarized", which is its second chapter and which contains 72 verses. 
Bhagavad Gita appears in the Mahabharata, an ancient Vedic epic. The text is considered sruti, which means “that which is learned through hearing”, because Krishna, the Surpreme Being, speaks it. It is also His illusory capacity which always and everywhere rules the material universe, the world of the constantly changing.