Based on Chapter 17, what distinguishes a truly wise person from a merely "learned" one, and what is the Guru's role in this distinction?

Chapter 17 of the Sai Satcharitra draws a sharp distinction between a truly wise person and one who is merely learned. A wise person has the discrimination to choose Shreya (the path of salvation) over Preya (worldly pleasure), like a swan separating milk from water. In contrast, the chapter questions the benefit of being "learned" if one does not know right from wrong and is constantly wallowing in sinful deeds. Such a person, whose heart is unsatisfied and mind is distracted by greed, will not find peace. This is where the Guru's role becomes paramount. The text explains that the Guru shows the path to a place that even the intellect and the Vedas cannot penetrate, helping the aspirant overcome deep-seated obstacles like lust and anger to attain true knowledge.