The Bhagavad Gita is an ancient Hindu text in written in Sanskrit. The text is a section of the Mahabharata. The text consists of Krishna expounding on philosophy and morality to Arjuna to prepare him for the battle of Kurukshetra.
In the Bhagavad Gita, the goal of life is to free the mind from selfish desire and to focus on the glory of Krishna (God), by dedicating one's actions to the divine. The Yoga way is to engage oneself in a higher form of activity through meditation, action, knowledge, and ultimately total surrender and selfless loving devotional service unto the Lord, which is the final goal of yoga and the ultimate goal of life.
The primary purpose of the Bhagavad-Gita is to illuminate for all of humanity the realization of the true nature of divinity; for the highest spiritual conception and the greatest material perfection is to attain love of God! Its intrinsic beauty is that its knowledge applies to all human beings and does not postulate any sectarian idealogy or secular view.