How did Sai Baba teach the importance of discipline in spiritual reading to the narrator?

In Chapter 18, Sai Baba masterfully teaches the narrator the importance of discipline. After sensing the narrator's envious thoughts, Baba sent him on an errand to Shama's house. While waiting for Shama, the narrator idly picked up a book, the Nath Bhagawat. The text from Chapter 18 recounts that, by a seeming coincidence, the book opened to the exact portion that the narrator had lazily neglected to read that very morning. This experience made the narrator realize that Baba had orchestrated the entire event to make him complete his reading and enforce what the text calls discipline, which "means regular reading." This illustrates how Baba guides his devotees not just through direct instruction but through subtle, real-life experiences.