How did the conversation between Sai Baba and Nana Chandorkar about a Gita verse begin?

The dialogue began when Sai Baba noticed Nana Chandorkar muttering or humming something to himself. As Chapter 39 recounts, Baba paused and asked Nana to recite what he was saying clearly and slowly so that it could reach His ears. Taking this as a command, Nana recited the four lines of the verse from the Gita. Following the recitation, Baba then specifically requested a detailed explanation and the meaning of the verse, which prompted Nana to share his scholarly understanding and set the stage for Baba's unique interpretation.