Using details from Chapter 19, provide a summary of Sai Baba's experience and devotion while serving his Guru.

Chapter 19 provides a profound account of Sai Baba's dedication to his Guru. Baba states he served his Guru for twelve years, from childhood to adulthood, with a strong desire to receive a mantra. This service was an act of pure devotion; Baba recalls, "I would gaze at my Guru's face with love day and night; I felt neither hunger nor thirst." He describes his Guru as an "idol of devotion and love" whose face would send him into meditation. For Baba, as he explains in Chapter 19, there was no other goal or contemplation besides his Guru, who in turn never neglected him and always provided protection.