Can you explain the difference between 'Kamya' and 'Nishkam' approaches to studying spiritual texts as described in the source?

The text presented in Chapter 0 distinguishes between two motivations for engaging with spiritual texts, whether they are knowledge texts or Guru biographies. The first is 'Kamya,' which means 'with desire.' This approach is used for worldly ends, such as attaining prosperity, or for the removal of specific problems like worries, calamities, distress, and diseases. The second approach is 'Nishkam,' meaning 'with a selfless mind.' This motivation is purely for spiritual liberation from the cycle of birth and death. The text makes a clear value judgment, stating that Nishkam Guru service, regardless of its form, will always be considered superior to any service performed with a Kamya or desire-based intention.