According to Chapter 11, why is it important for a devotee to focus on a Guru with a physical form?

Chapter 11 of the Sai Satcharitra explains that devotion to a manifest, or Saguna, Guru is essential for spiritual progress. The text argues that as long as the worshipper has a physical form or body, the Guru must also be in a physical form for devotion to truly take hold. It is through meditating on this manifest form that loving devotion can blossom. As Chapter 11 states, without this loving devotion, the "bud of the mind does not open," meaning spiritual consciousness cannot bloom. The scripture's determination is that the formless is only suitable for the formless, making a physical Guru necessary for a devotee in a physical body.