Bhagavad Gita 

The Bhagavad Gita is an intensely spiritual work that forms the cornerstone of the Hindu faith, and is also one of the masterpieces of Sanskrit poetry. It describes how, at the beginning of a mighty battle between the Pandava and Kaurava armies, thegod Krishna gives spiritual enlightenment to the warrior Arjuna, who realizes that the true battle is for his own soul.