Where can I find the section discussing 'shraddha' and 'saburi' in the source material provided?

You will not be able to find a section discussing 'shraddha' and 'saburi' in the provided source material. These concepts are not mentioned in the text. The content from Chapter 0 is a preface that describes the value of Guru biographies, their use for desire-based (Kamya) or selfless (Nishkam) purposes, and the historical context of such works by poets like Shri Mahipati. The specific spiritual teachings you are looking for are absent from the provided information.