How does Chapter 28 describe the nature of a Sadguru and their role in a disciple's life?

Chapter 28 explains that a Sadguru, like Sai, is proficient in both Shabda-Brahma (the divine word) and Para-Brahman (the Supreme Being), and possesses the crucial quality of being able to impart teachings to disciples. The chapter draws a powerful comparison to illustrate their significance: while a father gives birth to a body that is subject to death, a Guru's compassion is greater because they have the ability to remove the cycle of both birth and death for the disciple. This highlights the Guru's profound spiritual role in a devotee's life, as described in the verses of Chapter 28.