Can you describe the concept of the 'knowledge-sacrifice' or Jnana-yajna as explained in the text? What are its components and what does it achieve?

The knowledge-sacrifice, or Jnana-yajna, is a profound spiritual practice detailed in Chapter 50. In this internal sacrifice, the affirmation "I am Brahman" serves as the sacrificial post. The five great elements form the canopy, and the perceived difference between the individual soul (Jiva) and God is treated as the sacrificial animal. As Chapter 50 elaborates, the five senses and five pranas are the materials, while the fire of knowledge is kindled from the pits of the mind and intellect. The Jiva, as the sacrificer, offers the 'ghee of ignorance' as an oblation. The ultimate purpose of this sacrifice is to burn away the illusion of duality and manifest non-dual knowledge, leading to the soul's ceremonial bath in the bliss of the Self.