What is the importance of meditating on Sai's physical form (Saguna) for spiritual progress as mentioned in Chapter 52?

Chapter 52 emphasizes that meditating on Sai's physical, or Saguna, form is a crucial step in spiritual progress. It states that without first entering the Saguna form, the light of the Self, or the formless divine, cannot be known. The chapter posits that the Parabrahma, which is without attributes, is "entirely difficult to understand" directly. Therefore, by meditating immensely on Sai's physical form, the devotee can progress to a point where the subtle nature of the Self manifests as the focus on the form itself (Saguna) vanishes. This chapter explains that through this method of devotion to His form, Sai led His faithful devotees to liberation while they were still in their bodies.