What does the preface say about Sai Baba's specific teachings on 'shraddha' and 'saburi'?

The provided text from Chapter 0 does not contain any information about Sai Baba's specific teachings on 'shraddha' and 'saburi'. Instead, this chapter functions as a preface, focusing on the tradition and purpose of Guru biographies. It discusses how these texts can be used with desire (Kamya) for worldly gains or with a selfless mind (Nishkam) for liberation. The preface also mentions notable authors like Shri Mahipati and Shri Dasganu Maharaj, who wrote saints' biographies in the Ovi meter. However, the concepts of 'shraddha' and 'saburi' are not addressed in these introductory passages.