How does Chapter 21 describe the underlying unity of Saints, regardless of their different incarnations?

Chapter 21 offers a profound insight into the nature of Saints, stating that they are all fundamentally interconnected. It explains that Saints take incarnations in various places and at different times for specific purposes, but they are essentially inseparable from one another. The text highlights a secret arrangement and ancient institution among them. According to the principles laid out in Chapter 21, even though the country, time, and physical circumstances may differ, the signs of one Saint are completely known by another. This is because, inwardly, they are all one, sharing a unified spiritual consciousness that transcends external appearances and individual identities.