Why does Chapter 11 of the Sai Satcharitra emphasize the need for a physical, or 'Saguna', Guru like Sai Baba?

Chapter 11 explains that devotion to a manifest (Saguna) Guru is crucial for a devotee who also has a physical form. The text argues that without meditating on a tangible form, true devotion cannot manifest, and the mind cannot fully open. It posits that understanding the Saguna is much easier than grasping the abstract Nirguna (unmanifest). The chapter uses the analogy of ghee, which is the same substance whether frozen (formed) or melted (formless), to illustrate that Saguna and Nirguna are ultimately one. However, the path begins with the tangible, as love for the Saguna form is what firms the devotee's faith, eventually leading to the realization of the Nirguna.