Can you explain the relationship between meditating on Sai's form (Saguna) and realizing the formless Self, based on Chapter 52?

Chapter 52 teaches that the path to the formless Self begins with the form. It states that by meditating immensely on Sai's physical form, the subtle nature of the Self will eventually manifest as the Saguna, or form, vanishes. The text clarifies that one cannot know the light of the Self without first engaging with the Saguna form, because the attributeless Parabrahma is entirely difficult to understand directly. Sai showed His feet and used the power of love to mysteriously lead His faithful devotees, liberating them while still in the body and guiding them toward this supreme goal.