How did the son's devotional habits influence his father, Babasaheb Tarkhad, who was a follower of the Prarthana Samaj and not accustomed to idol worship?

The source material in Chapter 9 illustrates a significant influence. The son was a devoted worshipper of Sai Baba, a practice which included daily rituals before a photograph and offering Naivedya. His father, Babasaheb, was a follower of the Prarthana Samaj, a reformist movement that was generally against idol worship. However, out of love and respect for his son's unwavering devotion, Babasaheb agreed to continue the daily worship and Naivedya offering so his son could travel to Shirdi. This act of taking on his son's ritual led him to engage in the practice with sincerity, even praying to Sai to perform the service correctly. His subsequent deep remorse over forgetting the offering one day shows how his son's practice had led him to a personal and profound connection with Sai Baba.