As a devotee, why is it important to worship a Guru with a physical form, according to the teachings in Chapter 11?

Chapter 11 of the Shri Sai Satcharitra strongly emphasizes the importance of worshipping a Guru with a physical form (Saguna). It explains that as long as the worshipper themselves has a body, the Guru must also be in a physical form for devotion to take root. The chapter argues that devotion never truly manifests without meditating on the Saguna form. A physical form provides a tangible focus for love and worship; it is someone at whose feet you can place your head and whom you can worship with offerings. Chapter 11 states that this love for the Saguna is the easier path that ultimately leads to the more abstract realization of the Nirguna, or formless, divine aspect.