How does Chapter 17 describe the role of human effort and the beginning of the spiritual quest?

Chapter 17 emphasizes the importance of human effort, or Purushartha, in the spiritual journey. It states that the true purpose of human life is to actively discard Preya and honor Shreya. The spiritual quest often begins after a person becomes exhausted by the 'three unendurable torments' of worldly existence and starts searching for a way to stop this cycle of suffering. According to the teachings in Chapter 17, when this thought arises by great fortune, 'true manhood' (Purushartha) is born, and one must then strengthen the intellect to struggle for the sake of Shreya and dissolve ignorance.