Krishna discusses Jnana Yoga. Jnana Yoga is practiced by someone advanced enough in the path of Karma Yoga to take Sanyassa or to renounce the performance of prescribed duties in the world. They then devote themselves to the study of scripture as the primary means of distinguishing truth from illusion, intent on attaining Brahman or spiritual perfection. Krishna analyzes matter and spirit in great detail, including how to distinguish the three modes of material nature, the divine and demonic natures, the nature of the soul, the nature of God, and the nature of the world and how the laws of the world work as well as how all of these factors interact.