Can you explain the role of the Guru's physical form (Saguna) in spiritual realization as described in Chapter 52?

Chapter 52 emphasizes the importance of the Guru's physical form, or Saguna, as a crucial step in spiritual understanding. The text explains that meditating on Sai's physical form allows the subtle nature of the Self to manifest as the focus on the form (Saguna) eventually vanishes. It posits that without first engaging with the Saguna form, the light of the Self cannot be known. This is because the ultimate reality, the formless and attributeless Parabrahma, is described as being "entirely difficult to understand" directly. Therefore, as per the teachings in this chapter, the Guru's tangible form provides an essential and accessible pathway for devotees to approach the formless Absolute.