According to the teachings in Chapter 21, what is the underlying relationship between different Saints across time and place?

Chapter 21 reveals a profound concept about the fundamental unity among Saints. It teaches that although Saints may take incarnations in different countries and at different times for specific purposes, they are "essentially inseparable from one another." The chapter further clarifies that despite outward differences in their location, era, or appearance, the signs of one Saint are completely known by another. This is because, as the text explicitly states, "Inwardly, they are all one," pointing to a secret and unified spiritual arrangement among them.