What is the philosophical basis of the 'service' Sai Baba asked Annasaheb to perform, and how does it relate to the Gita?

When Sai Baba instructed Annasaheb to perform "my service," He elaborated on a deep philosophical concept. Chapter 3 explains that Baba distinguished between His perishable physical body and the imperishable, worthy-of-worship Brahman. He stated that He is omnipresent, pervading the entire universe in the form of the eightfold nature (Ashtadha-prakriti). The text explicitly notes that Baba mentioned the Lord Himself explained this very concept to Arjuna through the Gita discourse. Therefore, the 'service' was not merely physical worship but a call to realize Baba's true, all-encompassing nature, which is the essence of the universe itself.