What are the 'Kamya' and 'Nishkam' approaches to studying spiritual texts, and which one is considered superior?

As detailed in Chapter 0, spiritual texts and Guru biographies can be utilized in two distinct ways: with desire (Kamya) and with a selfless mind (Nishkam). The Kamya approach involves using these texts for worldly purposes, such as attaining prosperity or seeking relief from worries, calamities, distress, and diseases. In contrast, the Nishkam approach is performed for a selfless purpose: to achieve liberation from the world and freedom from the cycle of birth and death. The text makes it clear that Nishkam Guru service, regardless of its specific form, will always be considered superior to service performed with worldly desires in mind.