Why does Chapter 11 place so much emphasis on having a Guru with a physical form? What is the recommended way to worship the Guru according to this chapter?

Chapter 11 strongly advocates for devotion to a Guru in a physical, manifest (Saguna) form. The text argues that as long as the worshipper has a body, the Guru must also be in a physical form, calling this the "determination of the scriptures." The chapter suggests that faith in the Guru's word should be the devotee's seat, and they should renounce worldly desires. It encourages exclusive worship, stating the Guru exists in various forms like an idol, fire, water, and the sun. According to Chapter 11, by holding the Guru's feet with total devotion, the devotee can experience the wonder of the Guru fluctuating as the Supreme Brahman.