Can you explain the concepts of 'shraddha' and 'saburi' as they relate to the Kamya and Nishkam forms of devotion mentioned in the source?

The provided source material does not allow for an explanation of 'shraddha' and 'saburi' in any context, as these terms are not mentioned. Chapter 0 introduces the concepts of Kamya (for worldly gain) and Nishkam (for selfless liberation) service through the study of Guru biographies. It highlights Nishkam service as superior. However, the text makes no connection between these forms of devotion and the principles of 'shraddha' and 'saburi', as the latter are entirely absent from the supplied chunks.