How does Sai Baba illustrate the concept that he is present in all living beings?

Sai Baba illustrates his omnipresence through a powerful story detailed in Chapter 9. A lady in Shirdi gave a piece of her bread to a hungry dog and then to a pig. Later, when she met Baba in the mosque, he told her, "Mother, you fed me today; by that, my stomach is full to the throat." The lady was confused, as she had eaten her own meal elsewhere. Baba then explained that he has oneness with the very dog and pig she had fed, stating, "He who sees me in all beings, know him to be the one I love." This incident teaches that serving any hungry creature is equivalent to serving Baba himself, as he resides in all forms of life.