Why does Chapter 11 of the Sai Satcharitra advocate for worshipping a Guru with a physical form?

Chapter 11 of the Sai Satcharitra explains that devotion to a manifest, or Saguna, Guru is essential for a devotee who also possesses a physical form. The text posits that devotion cannot truly manifest without meditating on a tangible form, and without this loving devotion, the mind cannot blossom. As stated in this chapter, the scriptures determine that for a worshipper with a form, the Guru must also be in a physical form; the formless is suitable for the formless. It clarifies that this doesn't create a duality, because the manifest (Saguna) and unmanifest (Nirguna) are ultimately one and the same, just as ghee is still ghee whether it is frozen or melted.