Who are the two types of people described based on their motivations for using Guru biographies?

Chapter 0 distinguishes between two types of people based on their intentions for using Guru biographies and other spiritual texts. The first type is the person who performs "Kamya" service, using the texts with a specific desire in mind. This person seeks worldly benefits, such as prosperity, or the removal of personal worries, calamities, and diseases. The second type is the person who performs "Nishkam" service, using the texts with a selfless mind. Their goal is spiritual liberation from the world and freedom from the cycle of birth and death. The text clearly states that Nishkam service is always superior.