When one is taking care of one's health, it is required that along with medicines one should also not eat forbidden food in order to render the medicines effective. Similarly unless one renounces one's desire for the world, whatever one does in the Path of Karma and Path of Jnana, these practices shall not be the least effective.
Most important in the path of Karma Yoga or even Jnana Yoga is the act of renunciation. There are do's and don'ts for the success of any process. If the do's of the path of action and path of knowledge have to work , it is necessary that the don'ts have to be followed. In the path of Yoga, renunciation is the basis on which the whole system of Yoga shall be rendered effective.
Understanding the Gita, is a primary step towards a life of spirituality. The Gita is perhaps the only document that clearly dilineates the philosophy behind thought, what drives our actions and what one musts do, if one is to relieve himself from the clutches of a bound life. The Gita is an invitation to freedom.
It is important to understand that the Gita is the mirror which reflects our very nature, the Truth of all that is. Without Gita, the living entities of Kaliyuga shall long wallow in the dirt-mire of consumerism and materialistic living. The Gita is the voice of conscience. It is the bugle that can wake up the giant within us. It is high time that we rise and listen to the song of the soul, the Gita.