Neuroscience! I'm surprised no one's brought it up yet.

     "Men are simple," he replied. "They think primarily in terms of things, not relations. This is why they think it's the gold or silver that makes coins valuable, not the obedience they command. Tell them the Nilnameshi use pottery for their coins and they scoff."
     "Or, "Esmenet said, "that the Warrior-Prophet uses a woman."

...

     "Exactly," Kellhus said. "They ask, 'Where's the gold?'" He grinned at her sidelong. "Or in your case ..."
     "'Where's the thumb?'" Esmenet said ruefully.
     Thumb. Sumni slang for "phallus." Why did it pain him so, listening to her speak in the old way?
     Kellhus grinned. "They can't see that gold is only relevant insofar as it plays a role within our expectations–insofar as we make it relevant ..." He paused, his eyes sparkling with mirth. "The same," he continued, "might be said of thumbs."

Yeah, it looks like Auriga's got it right. A coin has the same value to a Dunyain as a dick.

And how does Moenghus (or any Cishaurim) experience this connection? Is it like Warging?

I'm inclined to think that a Psukari and his snake or snakes share a soul. We know that all sorcery is worked through the soul, especially so for the Cishaurim (they can have their souls removed by having their sorcery wrenched from them), and it seems like the snakes are deeply connected with at least some of the sorcery the Cishaurim practice. Moenghus' voice in the dreams he sends to the Dunyain comes out serpentine and his snake's eyes flash when he does the multi-face thing. Unfortunately, there are no other passages I'm aware of that show a connection between a Psukari's sorcery and his snakes.

Since it's always the sorcerer's eyes that light up, and Moenghus calls his snakes his eyes, I'm pretty sure that whatever metaphysical thing that happens to make a sorcerer's eyes light up happens to both the Psukari and the snakes. There's also the whole fact that the Cishaurim use the snakes to see, so the snakes' sensory input somehow has to be shared with the Cishaurim.

Ultimately, I don't think the snake and Psukari could share a point of view and both be involved in working the same sorcery if they don't share the same place, the same soul.

Even if there's no soul or sorcerous connection, Moenghus' snakes coming to him without him casting any sorcery after he'd been stabbed supports at least some sort of snake-Psukari connection.

If the Dunyain could ever trust one of their own - then maybe two Dunyain could communicate like Cnaiur does with Kellhus a few times through PON (some of my favorite moments in the series).

Makes me wonder about Ishual and how the pragma or any post-training Dunyain would talk to each other. They'd probably have to use more actual speech in the thousand thousand halls due to the general light-prohibition, but otherwise there might not be much said in Ishual at all.

We know from Esmenet that her matrilineal line is of the Few and many practiced as Witches - she only didn't at the behest of her Mother, apparently because of the social grief it causes. We know from our own history that men don't exactly need reason or quality rationale as to barring woman from institutions in society (or even social positions of equal subjective value).

"Did I ever tell you," she said, flinching from these thoughts, "that my mother read the stars?"

"Dangerous," he replied, "especially in the Nansurim. Didn't she know the penalties?"

The prohibitions against astrology were as severe as those against witchcraft.

This is the only time I can recall Esmenet talking about her matrilineal line, and she only says her mother read the stars. Were they actually of the Few?

Them dunyains... suspicious folks  -.0

Interesting that the dreams were sent to many recipients simultaneously.
Also the snake-y voice?  Perhaps the cish use the sssssnakes for an utteral component 

Makes me wonder about Moe's comment about facility with scrying.  Could he have been observing Kellhus' progress?  From campfires and hearths maybe?

The comment about scrying stands out to me for a couple of reasons.

If I'm not mistaken, Kellhus is able to use the metagnostic cant of transposing to get to either places he can see, or places that he knows very well. Furthermore, the cants of calling require that one be familiar with the place the recipient is in, which seems to tie into the whole needing to see the physical place or be familiar with the location before being able to transpose the two grounds. The restrictions about knowing the place could have several implications: needing to hold the spatial and temporal locations of the ground in your awareness to direct an inutteral toward it; and perhaps needing to be familiar with the meatphysical location of the ground, needing to know how the place that is your soul in the outside connects with the place that is that ground in the outside.

There are a couple of things I'm speculating about here: how and whether souls can interact with the metaphysics of the ground, whether there's a difference between soul and ground at all (perhaps not, considering how Kellhus says soul becomes place when we see the cant of transposing), and whether there's a connection between knowing the ground you want to go to and the probability trance.

I think that for Kellhus to know that nothing will interfere with the ground he wants to go to (like a bashrag smashing the ground or Aurang collapsing the floor beneath him), he has to know how that ground will appear in the future, which he may be able to accurately determine with the probability trance. It might also be that the probability trance draws a metaphysical connection between Kellhus' soul and the ground he wants to get to, but I've got no concrete evidence for that.

A lot (perhaps all) of Moenghus' magic that we've seen or that he claims to be capable of might be connected to knowing the ground and its movements, something best done through the probability trance (or the Thousandfold Thought, but I'm still not sure what to make of that). If Moenghus is capable of scrying, how might those skills be enhanced by the probability trance, and how may those enhancements enable him to manipulate Kellhus' journey and domination of the holy war?

The scrying could also be strongly linked to the third sight of the Cishaurim. Even if Moenghus could carry no water, if he made improvements to srcying with the probability trance and he could teach the Cishaurim to better grasp the subtleties of emotion involved in those improvements, then perhaps the Cishaurim weren't able to see Kellhus just because he shone in the third sight, but because his location, his soul, connected to so much ground that they couldn't help but see him. All roads lead to Kellhus.

Another errant thought is that the snakes may facilitate the third sight. We know from Mimara that they're holy, and Moenghus calls them his eyes, so there may be in intimate connection between a Cishaurim and his snakes. If so, then maybe the snakes make whatever sight the Cishaurim have more ... holy? I may have to continue this in Storks, Faith, & Holy Animals.