The topic of the sixth chapter is ‘Jñāna and the Upaniṣadic Nature of the Bhagavad-gītā’; the Gītā is one of the triple foundations of Vedānta, known as the prasthānatrayī, along with the Brahma Sūtra and the Upaniṣads. This chapter argues that as opposed to the Upaniṣads, the unique structure of the Bhagavad-gitā allows a categorization and characterization of this knowledge in the generally accepted philosophical terms of ethics, ontology and epistemology. Moreover, this chapter argues that the Gītā’s concept of jñāna or knowledge is systematic and unified, but as opposed to the generally accepted philosophical practice which makes linear arguments that start with premises and develop into larger conclusions, this type of knowledge is not linear but is hierarchical in that it leads to higher and higher states of being and consciousness, which could be considered mystical. Moreover, the Gītā has its own epistemic system according to which it differentiates philosophical knowledge based upon linear arguments from mystical knowledge, which is considered in different terms.