Karal remembers that moment endless days ago when a flash of Leareth's memory made it painfully clear how much Vanyel wanted to die. Does he, still, even now? Or does he just not know what to do with the change? But Leareth's right, that either way would take away something he was relying on to keep going. A lot like Leareth, in an awful way that assumed he simply wouldn't live to see a time when he wasn't needed - but Karal can see how that might be easier. Easier to tell yourself that you can just stop, when there's no more driving need to keep going. He doesn't feel that way himself, when there's rest enough to be had without dying - but maybe for Vanyel there isn't. (What is it that hurts him so much? Can Sing fix it, somehow? ...Would Sing let him die, if it couldn't?)
Karal isn't sure how well he really understands Leareth, let alone how well he can explain him, but - it does seem like it might be easier for him to explain, when he can at least clearly see the ways in which Leareth isn't anything like most people.
He can take control of their body when Leareth offers, and lift his head, again visibly a different person. "It might be easier for me to explain - Leareth doesn't really understand how unusual he is. Not that I entirely do either, but... I can try." He hopes Vanyel doesn't mind too much, that he's talking to Karal again. They're still near-strangers, and it feels wrong to push against that so hard, but - they cannot stay near-strangers, not even if both of them wanted to, so they are going to have to do something else.
"You know what it's like, to care about something so much that you'd just never consider stopping - not that you wouldn't decide to stop, after struggling with the question for a while and pushing yourself to do the right thing, but that you'd never think of it at all. The way people act when their small children might die." (And not all people, even then. Some will get tired and give up, eventually, when nothing seems like it's helping or will ever help. But some won't, and Karal is sure Vanyel knows what he means.) "... Leareth is like that about the entire world. I don't know how. I think he must have been born without... whatever it is that lets all the rest of us decide that some things are someone else's responsibility because they surely cannot be ours. And..." more quietly, looking down, "he was right." They shouldn't really have that argument now, but... speaking to Vkandis made it so completely obvious that Leareth was right, that the gods couldn't and wouldn't make the world the kind of place it should be, were too alien to even be capable of understanding what that was. Karal believed it before too, but believed it half on Leareth's word and half on uncertain guesses - it wasn't really the sort of thing he felt he could wrap his mind around. But it was simply true, and Leareth had seen it where nobody else had.
"And so he took that drive and he - built all of himself around it over lifetimes, keeping the core of what was important to him and losing so much of the rest." He hadn't thought of it before, but he thinks that it must have helped, to start each life anew filled with the one all-important purpose and not with any of the common human concerns that everyone else accumulates before they even know what is truly important to them. "And shaped himself to just... find what was needed and do it, every time, with almost nothing in his life beyond that - almost nothing he wanted and certainly nothing he wouldn't sacrifice. Including himself, even though he wants to live more than anyone I've ever met. He finds the next important task and he does it and he finds ways to make himself all right with it because it's the only thing that really matters - it's been the only thing that mattered to him for so long that he's half forgotten how to act for any other reasons. How to care about his normal human feelings just because he has them, rather than because fixing them will let him do something important on the impossible scale he looks at the world in. And... now there aren't any important things left, not really."
He still doesn't think he explained it right, what Leareth is, that impossibly stable core of him and the strange structure of the mind wrapped around it, still human but living as if all the human parts were beside the point. But maybe he came close. And whatever he got wrong, he hopes Leareth can explain - and that will be good for all three of them too.