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

Chapter 22 of the Shri Sai Satcharitra places immense importance on the feet of the Sadguru, presenting them as the ultimate object of devotion and a source of divine power. The text states that for devotees, there is 'no other path for us Except Your feet' to achieve complete happiness. The chapter uses a clever analogy, the 'logic of the branch and the moon,' to explain how focusing on a part of the form leads to a vision of the whole truth. Specifically, the big toe is highlighted. As described in Chapter 22, Baba would sit with his right foot over his left knee, and the nail of his right big toe would shine like a crescent moon, fulfilling the devotees' longing for a divine vision. This symbolism culminates in the story of Das Ganu, where Baba explicitly equates his big toe with the holy pilgrimage site of Prayag, from which the sacred rivers Ganga and Yamuna miraculously flowed.