The text says the paths of Guru service are 'infinite'. Please list at least ten different methods of Guru service described in the preface.

While the preface in Chapter 0 states that the paths of Guru service are infinite, it does not provide an exhaustive list of ten or more methods. Instead, it highlights a few key examples to illustrate the principle. It discusses the general act of serving saints with one's entire being—body, mind, and soul—as described by Dnyaneshwar Maharaj. It then focuses on literary service, distinguishing between writing biographies of worldly figures and saints. The text identifies the best form of this service as writing the biography of one's Sadguru, studying it, performing recitations, and encouraging others to do the same, as explained in Chapter 0.