What is the ultimate spiritual goal of Guru service according to the text, and what is the recommended method to achieve it?

The ultimate spiritual goal of performing Guru service, as described in Chapter 0, is to achieve salvation, which means liberation from the world or freedom from the cycle of birth and death. While various forms of service exist, the text presents a specific method as the most certain path to this goal. This path involves writing the biography of one's own Sadguru, either by their command or through inner inspiration. Following this, one should personally study it regularly, perform recitations (Parayans and Saptahs) with a pure heart and unwavering devotion, and also encourage other devotees to engage in this practice.