Can you explain Baba's teachings on shraddha and saburi based on the provided text?

The provided text does not contain any information about Baba, shraddha, or saburi. Instead, the excerpts from Chapter 0 focus on the tradition and purpose of spiritual texts, particularly Guru biographies. It explains that such texts can be studied with desire (Kamya) for worldly prosperity or with a selfless mind (Nishkam) for liberation from the cycle of birth and death. The chapter also mentions the historical context of Marathi poets like Shri Mahipati and Shri Dasganu Maharaj, who wrote biographies of saints. However, it does not detail the specific teachings of any Guru, including the concepts of shraddha and saburi.