What specific events described in the text caused Narayanrao's faith in Sai Baba to become so strong and unshakeable?

Narayanrao's faith grew through direct, personal experience, as detailed in Chapter 33. The pivotal moment was when he visited Baba, who told him his time of servitude was over and he should start his own business. This prophecy came true when his job was released shortly thereafter. He then established his own successful enterprise, "Anandashram," which brought him peace and prosperity. The text states, "Seeing such developments, faith in Sai's feet increased; that then developed into the form of firm devotion; through experience it became unshakeable." This demonstrates that his faith was built on the foundation of seeing Baba's words manifest perfectly in his life.