Why does Chapter 11 of the Sai Satcharitra emphasize worshiping a Guru with a physical form?

Chapter 11 of the Sai Satcharitra explains the importance of a manifest Guru by stating that as long as a worshipper has a physical form or body, the Guru must also be in a physical, or 'Saguna', form. The text argues that devotion cannot truly manifest without meditating on this tangible form, and without this loving devotion, the bud of the mind does not open. As Chapter 11 clarifies, for a being with a form, the formless is not suitable for worship, a determination it attributes to the scriptures. This approach allows devotees to connect with the divine in a relatable way, which is presented as a necessary step on the spiritual path.