The Bhagavad Gita is a classic Hindu scripture that reveals a conversation between Lord Krishna and Arjuna in the middle of a battlefield before a battle. Krishna explains the duty of a warrior and prince along with spiritual teachings such as yoga, reincarnation, and Samkhya.
The Bhagavad Gita was a favorite work of Mohandas Gandhi, Henry David Thoreau, Albert Einstein, and many other thinkers.