According to Chapter 21, what is the underlying nature of Saints and how do they relate to one another?

Chapter 21 explains a profound concept about the unity of Saints. It posits that although Saints may take incarnations in different places and at different times for specific purposes, they are "essentially inseparable from one another." This means that despite apparent differences in country, time, and physical form, inwardly they are all one. The chapter further elaborates that the signs of one Saint are completely known by another, highlighting a secret, interconnected arrangement among them. This teaching from Chapter 21 emphasizes a universal, unified consciousness that manifests through various holy personages across history.