The preface says a Sadguru could be your husband or wife. Can you tell me more about this or provide any examples from the text?

The Preface (Chapter 0) posits that a Sadguru is essential for salvation and can manifest in various forms, not limited to a traditional saint. To illustrate this point, Chapter 0 lists many potential forms, including 'saints, deities, mother, father, siblings, friend, husband or wife.' However, the text's purpose in listing these is to show the universality of the principle, and it does not provide any specific stories or examples of a husband or wife acting as a Sadguru. The focus remains on the core idea that one must have the grace of a Sadguru, regardless of the form they take.