What were the main spiritual lessons Baba taught through his interaction with Cholkar?

Through the incident with Cholkar, Sai Baba imparted profound spiritual teachings about his true nature. Chapter 15 explains that after revealing his knowledge of Cholkar's secret vow, Baba elaborated on his omnipresence. He taught that even if a devotee is 'beyond the seven seas,' He knows their every action instantly because His true home is in the devotee's heart, stating, 'I am your inner self.' He further explained that He exists in all beings—insects, ants, and every person one might meet. The ultimate lesson was one of non-duality, as Baba told Cholkar, 'Do not keep any distance from me; you and I are one,' emphasizing that recognizing this oneness is the mark of great fortune.