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

Chapter 52 delves into the advanced philosophy of devotion, explaining that meditating intensely on Sai's physical form, the Saguna, is a crucial first step. It posits that the subtle nature of the Self will manifest only as the attachment to the physical form (Saguna) vanishes. The chapter clarifies that without first entering the Saguna form, the light of the Self cannot be known, because the formless, attribute-less Parabrahma is entirely difficult to grasp directly. Thus, by showing His feet and through the power of love, Sai mysteriously led His faithful devotees towards the supreme goal of liberation.