What specific devotional activities in Shirdi are mentioned as providing spiritual benefits to followers?

Chapter 4 outlines several devotional acts that carried immense spiritual weight for Sai Baba's followers in Shirdi. The mere sight, or 'Darshan,' of Sai was considered a complete Yoga practice. Simply conversing with him was said to wash away all sins. The physical act of massaging his feet was equated to a purifying bath in the sacred Triveni river confluence. Furthermore, partaking of 'Tirtha,' the water from his feet, was believed to uproot worldly desires. Receiving his 'Udi-Prasad' (sacred ash) was a holy act that sanctified the devotee. His command was held as a Vedic word, and his presence provided an accessible path to spiritual pacification.