How does Chapter 52 describe the relationship between meditating on Sai's physical form (Saguna) and realizing the formless Self?

Chapter 52 explains that meditating immensely on Sai's physical form, or the Saguna, is a necessary step toward understanding the formless Self. The text posits that as the Saguna form vanishes from the devotee's focus, the subtle nature of the Self will manifest. It explicitly states that "Without entering the Saguna form, the light of the Self cannot be known." This is because, as Chapter 52 clarifies, the Parabrahma, which is without attributes, is otherwise "entirely difficult to understand." Thus, the tangible form of the Guru serves as the gateway to comprehending the intangible, formless reality.