Jnana Yoga is the path of knowledge. The ideal of self-realization cannot be attained without knowledge, because it is only with true knowledge that the self can rise above physical desire and the attachment to sense-objects. Jnana Yoga is a process of learning to discriminate between what is real and what is not, what is eternal and what is not. Through a steady advancement in realization of the distinction between Real and the Unreal, the Eternal and the Temporal, one develops into a Jnana Yogi . This is essentially a path of knowledge and discrimination in regards to the difference between the immortal soul ( atman ) and the body.
Arjuna asks Krishna what a man who is freed from mundane concerns is like, what a wise man does in life on a daily basis. It is a truly wonderful question, for it hits at why most laymen are afraid of pursuing a spiritual path -- namely the idea that they have to give up the world in order to find peace. Arjuna says that such a man lives in the world, but simply has no concern for results. He finds peace in the work, peace in the universe, because he has found himself. There is no such thing as good or bad, there is no such thing as life and death. There is what he sees and nothing more.