How did Sai Baba describe his true, imperishable nature, and what did he say was the path to true worship beyond his physical form?

Sai Baba explained that his physical body is perishable, but his true self is the imperishable Brahman, which is worthy of worship. As described in Chapter 3, he identified himself with the eightfold nature (Ashtadha-prakriti) and stated that he is present in all things, both moving and unmoving, in the universe. He explained that he is filled in all ten directions and that there is no object different from the Self. True worship, therefore, involves understanding this omnipresence. The goal is to cultivate the feeling that he is everywhere, which leads to the dissolution of 'I' and 'mine', and consequently, the end of worldly desires.