What does Chapter 21 say about the connection between different Saints, even if they live in different times or places?

Chapter 21 explains the profound and secret unity among Saints. It teaches that while Saints may take incarnations in different places and at different times for specific purposes, they are essentially inseparable and inwardly one. The text uses an analogy, comparing the spiritual realm to a kingdom where the 'Emperor of Self-bliss' (God) has outposts in various places. The Saints are like officers appointed to these outposts, all working invisibly under the same authority. As Chapter 21 states, 'Country, time, and objects may differ, but the signs of one are known completely by another Saint; Inwardly, they are all one.'