What profound spiritual lesson did Sai Baba teach through the incident with Cholkar's vow?

Through the incident with Cholkar's vow, Sai Baba imparted a profound lesson on His omnipresence and immanence. As Chapter 15 reveals, after demonstrating knowledge of Cholkar's secret vow and sugar sacrifice, Baba explained, 'Even if my body is here, and you are beyond the seven seas, Whatever you do there, I know it instantly.' The core teaching was that Baba is not confined to his physical form in Shirdi but resides within the hearts of all his devotees ('My home is in your heart; I am your inner self'). He further expanded this by stating his presence in all of creation, from insects to humans. This experience was designed to give Cholkar personal proof of this divine truth and to deepen his faith, showing that sincere devotion is always seen and known by the Divine.