He loves Serwe, Esmenet,Cnaiur, Akkamian and even Proyas, the worst sin however is that he loves himself. Every mistake Kellhus makes is because of love...
My reread of TUC could be a very unprobable thing, so I beg forgiveness if I will mix some fact.
Anasurimbor Koringhus was described as a greater duniyain than his father, right? And one of the main fact about him is saving of defective, little, helpless son with further care.
So I take it some things run in the family and the talent for being a cold, reasoning, effective thing capable of hacking reality could actually come from being capable of deep emotions -- like, if that conflict is always with you, it's your life-time, personal, permanent gym. In terms of a rpg, you're constanly generating small points of experience by yourself.
That way most duniyains are just anemic and well-bred pug-likes, who have nothing to fight inside them and thus lack most parts, levels and volumes of such skill (imagine an inversion of Moe's issue with Psukhe). They are a deadlock path.