MadePossible

I just read your description. It seems you're talking about something else entirely. My mistake.

Is this the Chen Tuan sleep meditation (睡功)? I've been practicing it but I don't feel anything special. Could anyone provide any tips and tricks? I think maybe if you're not yet a high-level practitioner, then it's probably pointless. I say that, because the start of the practice mentions swallowing 'saliva', which is an advanced stage of neidan, and this meditation is considered neidan. Perhaps Yoga nidra would be better.

Are all instances of 常 actually 恒 or only some?

Because I see no real difference between the chapters of the two sections. The versions of the Daodejing I'm aware of begins the 德经 at chapter 38, yet virtue is discussed before this chapter and 道 is still discussed after chapter 38. I'm not understanding the reasoning.

Here are some things I have wondered: 1. Does the Daozang have any 'council of Nicaea' type conspiracy theories? For example, many people speculate why the Christian canon was compiled the way it was, with some books selected and many books burned in the fire, perhaps because they were too revealing or truthful. Likewise, did the books selected for the Daozang also have controversies why they were included in the canon, or why some books weren't selected? 2. Does the Zhengyi school really come from the Way of the Celestial Masters sect? 3. Any interesting, fringe theories about Lü Dongbin, Wang Chongyang (founders of the Quanzhen school)? I say ancient Daoism, because I don't really care about the petty drama and scandals between rival Daoist schools and lineages after the Yuan dynasty.