What are the two different motivations for engaging in Guru service, such as studying a Guru's biography, and which one is considered superior?

According to Chapter 0, Guru service, including the study of a Guru's biography, can be performed with two different mindsets. The first is 'Kamya,' which means it is done with a desire for worldly gains, such as achieving prosperity or removing worries, calamities, and diseases. The second motivation is 'Nishkam,' which is performing the service with a selfless mind for the sole purpose of attaining spiritual liberation from the cycle of birth and death. The text is unequivocal in its judgment, stating in Chapter 0 that Nishkam Guru service, being free from selfish desire, will always be superior, regardless of the specific type of service being performed.