The Bhagavad Gita (Song of God) is a Sanskrit text from the 5th century B.C. Some scholars believe it dates back even further.

The Gita is a conversation between Lord Krishna and the warrior prince Arjuna on the battlefield of Kurukshetra. Arjuna is about to face his brothers, teachers and loved one's in battle. When he questions the duty, honour, morality and humanity of slaying brothers in battle, Lord Krishna addresses the moral dilemmas of all of life's battles. What follows is a comprehensive instruction on to Hindu philosophy  and its way of practical and righteous life.

The Bhagavad Gita is greatly revered by Hindus. The book has been the moral and practical compass to a great mass of humanity for ages.

The terms Yoga and Karma are addressed in great detail in Gita. The book talks of duty and detachment, selfless action and attunement to the greater common truth within, the Self or Atman, as the path to serenity of mind.