How does Chapter 52 describe the importance of Sai's physical form (Saguna) in the path to realizing the formless (Nirguna)?

In Chapter 52, the text explains the critical role of meditating on the Guru's physical or manifest form (Saguna). It posits that the formless, attributeless reality, the Parabrahma, is entirely difficult for most to comprehend directly. Therefore, the path to understanding the formless begins with the form. Chapter 52 states that "Without entering the Saguna form, the light of the Self cannot be known." By meditating immensely on Sai's physical form, the devotee's mind is purified and focused, which paradoxically leads to the manifestation of the subtle nature of the Self as the attachment to the Saguna form itself eventually vanishes, paving the way for understanding the Nirguna.