How does Chapter 52 explain the philosophical journey from meditating on Sai's physical form (Saguna) to understanding the formless Self?

Chapter 52 delves into the process of spiritual realization, explaining that meditating immensely on Sai's physical form, or Saguna, is a crucial step. It posits that as this meditation deepens, the subtle nature of the Self will manifest just as the attachment to the physical form vanishes. The chapter argues that without first entering the Saguna form, the light of the Self cannot be known, as the attributeless Parabrahma is entirely difficult to grasp directly. Thus, Sai Baba showed His own feet and, through the power of love, mysteriously led His faithful devotees from the tangible form towards liberation and the supreme, formless goal.