Can you provide a summary of the core philosophical message presented in Chapter 17 regarding the choice between salvation and worldly pursuits?

The core message of Chapter 17 is a philosophical discourse on the critical choice between Shreya (the path of Good/Salvation) and Preya (the path of Pleasant/Worldly Joy). It establishes that Shreya is wisdom, while Preya is ignorance. The chapter explains that although both choices are within a person's reach, the dull-witted are often conquered by Preya, pursuing sensory pleasures and material gain. As detailed in this chapter, the true purpose of human life (Purushartha) is to develop discrimination and be like the swan that wisely separates milk from water, choosing Shreya. This choice requires conscious effort to overcome internal obstacles like lust, anger, and desire to escape the cycle of suffering.