According to Chapter 28, what is the nature of Sai and his presence in the world?

Chapter 28 explains that Sai is not separate from anyone and dwells in all beings, from the highest entity like Brahma down to the ant and the smallest insect. He is described as pervading all things everywhere. The text further elaborates that Sai is complete in Shabda-Brahma (the divine word) and shows the signs of Para-Brahman (the Supreme Being). These qualities, along with the ability to impart teaching to disciples, are what make him a Sadguru.