What philosophical concept regarding the unity of Saints is presented in Chapter 21?

Chapter 21 of the Sai Satcharitra presents a profound philosophical concept about the underlying unity of all Saints. The text explains that although Saints may take incarnations in different places and at different times for specific purposes, they are "essentially inseparable from one another." It elaborates that while external factors like country and time may differ, the inner signs of one Saint are completely known to another. The core teaching articulated in Chapter 21 is that "Inwardly, they are all one." This reveals a secret, divine arrangement and a shared consciousness that connects these great souls, allowing them to work in concert beyond the perception of ordinary people.