Why is meditating on Sai's physical, or 'Saguna', form considered important for spiritual realization in Chapter 52?

Chapter 52 emphasizes the importance of meditating on Sai's physical 'Saguna' form as a crucial step toward spiritual realization. The text explains that the ultimate reality, the 'Parabrahma,' which is without attributes, is entirely difficult to understand directly. Therefore, one must first enter the 'Saguna' form, as the light of the Self cannot be known otherwise. By meditating immensely on Sai's physical form, the devotee is mysteriously led toward the supreme goal, and the subtle nature of the Self manifests as the focus on the form eventually fades away, revealing the formless reality.