Lessons from 'The Bhagavad Gita' by Veda Vyasa. The Gita is an essential text within the Mahabharata. It is a dialogue between Lord Krishna and the warrior prince Arjuna, who is conflicted about fighting in the Kurukshetra war. The Gita explores themes of duty, discipline, identity, Atman and Brahman, righteousness, and the nature of reality.