"Ah yes, let's cover Things You Can Do With Liao. You've seen Insight, looking at the state of a soul.
You can also do Anointing, which gives someone a temporary shove towards one of the Virtues, like I could make you more inclined to keep your commitments, and able to draw on that strength to counteract other effects that might make you not do that.
There's also Dedication, which aligns your soul with a Virtue - it's mostly useful in conjunction with the others, you can only have one Dedication at once and it affects what Anointings and so on you can do.
And there's Consecration - like Anointing, but a more limited range of effects and on a place rather than a person - and Hallow - which puts the effect on an item, you then feel it when you're holding or using it, along with a little description if you like.
The others are a bit different: Testimony lets you put a couple of words on the soul, that you can read back off with Insight, and that probably do something to help you retain qualities when going through the Labyrinth but we don't have solid evidence of this, sometimes you get them back from past life visions though.
Exorcism lets you affect spiritual entities - ghosts, possessing entities, souls in jars, sometimes when a soul's been knocked out of place a bit by a past life vision, that can happen if you're not careful in them, some kinds of curse...
And Excommuncation, that doesn't come up much thankfully, it basically cuts you off from your soul - reversibly! - you don't dream, you can't use liao, apparently it feels pretty awful too, everything is muted and it's harder to be virtuous. It occasionally has uses for fixing really weird soul maladies, and sometimes it gets used to stop someone dedicated to one of the malign spiritual presences getting up to anything else with it. And of course sometimes people deploy it politically, or just to hurt people, like everything else.
Sumaah are rather more inclined to use it as a punishment; we're not sure what happens to your soul when you die excommunicate but it's unlikely to be good, so we generally try to stop people from doing that even when they want to."