Why is meditating on Sai's physical (Saguna) form considered an important step for a spiritual seeker, based on the teachings in Chapter 52?

Chapter 52 explains that meditating on Sai's physical, or Saguna, form is a crucial step in spiritual practice because the ultimate reality is difficult to grasp directly. The text states that "without entering the Saguna form, the light of the Self cannot be known." It clarifies that the Parabrahma, which is formless and without attributes, is "entirely difficult to understand." Therefore, focusing on Sai's form provides a tangible object for devotion and meditation. This practice, as described in the chapter, allows the subtle nature of the Self to manifest as the devotee's attachment to the form eventually vanishes, leading them toward the supreme goal.