Based on Chapter 27, elaborate on the significance and role of the Sadguru in a devotee's life.

Chapter 27 portrays the Sadguru as the ultimate spiritual authority and the direct means to liberation. The chapter begins by declaring that holding firmly to the Sadguru's feet is the same as bowing to the Trinity and the Supreme Brahman, granting the merit of all pilgrimages. The Guru is called a 'wish-fulfilling tree of liberation' and an 'ocean of self-knowledge.' Furthermore, Chapter 27 explains that the Guru finds supreme joy in the devotee's spiritual progress and happiness. This chapter emphasizes that the emergence of supreme love and the subsiding of passions are manifestations of the Guru's grace, which cannot be found without complete faith in the Guru's feet.