What was the 'great wonder' experienced by listeners who were sent from the Masjid to the Wada?

The 'great wonder' described in chapter 18 refers to the miraculous synchronization between Sai Baba's words and the sacred texts being read by Bapusaheb Jog. Baba would often tell a short story to a devotee in the Masjid and then instruct them to go to the Wada for the book reading. When the sincere listener arrived, they would be astonished to find that the portion of the book being read at that moment, whether Jnaneshwari or Nath Bhagawat, contained the very same story Baba had just told them. This experience provided irrefutable confirmation of Baba's teachings and omniscience, making it appear as if Eknath's or Jnaneshwar's words were merely a translation of Baba's own story.