Can you explain the relationship between Saguna (manifest) and Nirguna (formless) worship as described in Chapter 11 of the Sai Satcharitra?

Chapter 11 teaches that Saguna (with form) and Nirguna (formless) are not different from each other, but are two aspects of the same reality. The text uses the analogy of ghee, which is called ghee whether it is frozen (solid form) or melted (liquid form). It explains that understanding the Saguna is much easier for a devotee, and once love for the manifest form is firm, the realization of the Nirguna naturally follows. For a worshipper who has a physical body, the scriptures determine that a Guru in a physical form is most suitable, as devotion to a manifest form is the key to opening the bud of the mind.