What qualities define a Sadguru according to the description provided in Chapter 28?

Chapter 28 outlines the essential qualities of a Sadguru, using Sai Baba as the prime example. It states that a Sadguru is complete in 'Shabda-Brahma' (the divine word) and shows signs of 'Para-Brahman' (the Supreme Being). Beyond profound knowledge, a true Sadguru possesses the crucial ability to impart teachings to disciples. The chapter highlights the Sadguru's unique compassion, noting that while a father gives birth to a body that is subject to death, the Guru has the power to remove the very cycle of birth and death, offering a far greater gift.