What are the fundamental differences between Shreya and Preya as described in Chapter 17 of Sai Satcharitra?

Chapter 17 of the Sai Satcharitra explains that Shreya and Preya are two distinct paths with opposite natures, much like light and darkness. Shreya is defined as the path of salvation or the Good, representing the form of discrimination and pure knowledge (Vidya). In contrast, Preya is the path of worldly joy or the Pleasant, which is described as the form of ignorance (Avidya) and a lack of discrimination. According to the text, a person whose mind is drawn to Preya ultimately falls away from their true self-interest, whereas the wise are never deluded by it. The chapter emphasizes that Shreya is the path of wisdom, while Preya is disliked by the wise but embraced by the ignorant.