What is the significance of 'Purushartha' or true human effort as discussed in Chapter 17, and how does it relate to the cycle of Samsara?

According to the teachings in Chapter 17, the true purpose of human life, or Purushartha, is to discard the path of the pleasant (Preya) and honor the path of the good (Shreya). This chapter explains that the unfathomable wheel of worldly existence, or Samsara, causes man to suffer unendurable torments. It is only when a person becomes exhausted by this sorrow that they begin to search for a way to stop this cycle. As Chapter 17 states, when this thought arises by great fortune, true manhood or Purushartha is born. This effort involves strengthening the intellect to choose Shreya and struggling to overcome the obstacles on this spiritual path.