Can you detail the specific 'leelas' or miracles mentioned in the text that are used to teach the principles of shraddha and saburi?

The provided excerpts from Chapter 0 do not detail any specific 'leelas' (wonderful plays) or miracles of any Guru. While Chapter 0 mentions that a Guru's biography is a reliable book that describes a Guru's 'incomparable miracles', it does not provide any concrete examples. Furthermore, the principles of 'shraddha' and 'saburi' are not discussed at all in the supplied text. The primary focus is on the nature of Guru biographies, their use for desire-based (Kamya) or selfless (Nishkam) study, and the poets who wrote them, not the specific content or teachings within them.