Why does Chapter 11 of the Sai Satcharitra stress the importance of worshipping a Guru with a physical form?

Chapter 11 of the Sai Satcharitra explains that devotion to a manifest (Saguna) Guru is essential for a devotee who also possesses a physical form. The text posits that devotion cannot truly manifest without meditating on a physical form, and until that loving devotion occurs, the mind cannot spiritually blossom. According to the chapter, for the formless, the formless is suitable, but for a worshipper with a body, the Guru must also be in a physical form. This act of meditating on Sai Baba's manifest form is considered so potent that the chapter equates it to the sacred chanting of the Eleven Rudras, highlighting it as a powerful path to spiritual realization.