Based on Chapter 27, what is the relationship between a devotee's spiritual progress and the Guru's happiness, and how does faith play a role?

Chapter 27 explains a deeply interconnected relationship between the Guru and the devotee. It states that the Guru finds supreme joy in whatever constitutes the devotee's own happiness. Furthermore, as the devotee turns more towards the spiritual path, the Guru feels even more wonder and delight. This progress, however, is contingent on faith. The chapter emphasizes that without ultimate faith in the Guru's feet, the six passions like lust will not subside, and supreme love, devotion, and the eight sattvic emotions will not arise. This faith is the key that unlocks the Guru's grace and enables the devotee to overcome worldly attachments.