What does Chapter 21 say about the nature of Saints and their interconnectedness?

Chapter 21 explains that Saints and Sages are fundamentally interconnected, even if they appear in different places, at different times, and in different forms. The text states that while their country, time, and objects may differ, the signs of one Saint are completely known by another. It emphasizes that inwardly, all Saints are one and are essentially inseparable from one another. The chapter suggests they take incarnations from time to time in places they like for specific purposes, but their essential nature remains unified, revealing a secret arrangement and an ancient institution among them.