What are the two different motivations for studying a Guru's biography, and which one is superior?

The preface describes two distinct motivations for studying a Guru's biography or other sacred texts. The first is 'Kamya,' which means approaching the text with a specific desire. This could be for worldly gains like prosperity or for the removal of personal afflictions such as worries, diseases, or other calamities. The second motivation, as outlined in Chapter 0, is 'Nishkam,' which involves studying with a selfless mind, purely for the goal of spiritual liberation from the cycle of birth and death. The text explicitly states that Nishkam Guru service is always superior, whether the service involves writing, studying, or any other form of devotion.