What is the significance of Sai Baba's big toe as described in Chapter 22?

Sai Baba's big toe holds profound significance in the teachings of Chapter 22. Firstly, it served as a focal point for meditation and vision, likened to the crescent moon. The chapter describes a specific posture Baba would take, and how the nail of his right big toe would shine, fulfilling the devotees' longing for a divine sight. Secondly, and more miraculously, the big toe is presented as a sacred pilgrimage site. According to Chapter 22, when Das Ganu wished to bathe at Prayag, Baba declared His own big toe to be Prayag. Upon Das Ganu's surrender, the holy waters of the Ganga and Yamuna flowed from it, demonstrating that the Guru's feet contain the sanctity of all holy places.