What was the deeper spiritual lesson Sai Baba taught Cholkar after the incident with the tea?

After revealing his knowledge of the sugar vow, Sai Baba imparted a profound spiritual lesson about his omnipresence. He explained to Cholkar that his secret vow and the long delay were fully known to Him. The teachings in Chapter 15 capture Baba's words: "Even if my body is here, and you are beyond the seven seas, Whatever you do there, I know it instantly." Baba declared that his true home is within the devotee's heart and that he is their inner self. He further elaborated that he exists in all beings—insects, ants, animals, and every person one meets—concluding with the ultimate message of non-duality: "you and I are one."