According to Chapter 17, what is the true purpose of human life, and what are the main obstacles one must overcome?

As detailed in Chapter 17, the true purpose of human life, or 'Purushartha', is to consciously discard the path of Preya (the pleasant) and honor the path of Shreya (the good). To achieve this, one must overcome significant obstacles. The chapter mentions the incessant spinning of the wheel of worldly existence (Samsara), which causes unendurable torments. Other major obstacles identified are beginningless ignorance (Maya), which is a false imposition like a mirage, as well as the desires, hopes, and cravings for worldly enjoyments. The text also specifically names lust and anger as tendencies that disrupt meditation and prevent the attainment of knowledge.