How does the incident involving the narrator's jealousy and the subsequent trip to Shama's house illustrate Sai Baba's omniscience and teaching methods?

This story from Chapter 18 provides a powerful illustration of Baba's divine attributes. First, it demonstrates his omniscience, as he instantly knew the narrator's unspoken thoughts of jealousy towards Sathe, with the text stating, 'The thought that arose in my mind at that time, He immediately knew it.' Second, it showcases his unique teaching style. Rather than a direct rebuke, Baba used a subtle and practical method. By sending the narrator to Shama on an errand, he engineered a situation where the narrator would 'coincidentally' find the Nath Bhagawat book opened to the very page he had neglected, teaching a personal lesson about discipline.