What role does the Sadguru play for a devotee as described in Chapter 1, and how is Sai Baba presented in this context?

According to Chapter 1, the Sadguru plays the crucial role of a guide who helps devotees navigate the challenges of life. The text uses the metaphor of a 'boat for the river of worldly existence,' with the devotees as passengers needing to be shown the other shore. Sai Baba is presented as the ultimate Sadguru in this context. The author addresses him directly, stating, 'You alone are our Sadguru, the boat for the river of worldly existence; we are the passengers, show us the other shore.' This highlights the belief that attaining the feet of a Sadguru like Sai is a result of merit from past lives and is essential for spiritual progress.