The preface discusses various forms of Guru service. What is the distinction made between worldly service and the type of service that yields ultimate spiritual fruit?

The preface, as detailed in Chapter 0, distinguishes between worldly and spiritual Guru service. Worldly service, such as writing biographies of great politicians, warriors, or writers, is acknowledged as a form of public service. However, its importance and fruits are considered temporary and limited by space and time, often rooted in self-interest, and therefore do not yield eternal spiritual benefits. In contrast, the highest form of service that grants the fruit of salvation is described as writing the biography of one's own Sadguru, either by their command or through inner inspiration. This act, when combined with regular study, recitations (Parayans), and unwavering devotion, is considered the most certain path to the ultimate spiritual goal.