How does Chapter 42 describe the power and importance of a Sadguru in a devotee's life?

Chapter 42 portrays the Sadguru as a profoundly transformative force. It refers to Sai Baba as a "Wish-fulfilling Tree (Kalpataru)" for his devotees. The text explains that through the Guru's grace, the distress and fear associated with worldly existence are removed, and the path to ultimate liberation is opened. According to this chapter, constant remembrance of the Sadguru's feet has the power to dissolve the very nature of obstacles, turning unhappiness into happiness and causing the sorrows of worldly life to be forgotten. The author encourages readers to listen to the stories of such a capable one for their own spiritual benefit and attainment of holiness.