Maybe I can put it this way:
Depressing Dilemma of Despair:
1. For any person x, either (a) x is mortal, or (

2. If (a) x is mortal, then everything x does will be undone, all x's projects will be for nothing (e.g., witness all the corpses on the battlefield in Pale)
3. If everything x does is undone, x's life is futile.
4. If (

5. If x is caught up in a cycle of petty endeavors for eternity, x's life is futile. Therefore:
6. For any person x, x's life is futile.
A lot of people in the novel seem to be struggling with something like this here. Crokus isn't, but that's because he's too young to have the requisite perspective. Whiskeyjack is. Lorn seems to be. Paran seems to be. Some of the Ascendants are. Rallick is. And what does SE give us to disarm this depressing problem?
One line seems to come from Mammot. Crokus remembers his uncle's enthusiasm at one of the festivals, where Mammot says something about how stupid people are, but at least we can celebrate something eternal--the rhythms of nature (or some such). This seems like a motif we get from Bambi or the Lion King, but without the schmultz.
Another line seems to come from Rallick and Anomander. Both of these seem to be trying to find redemption of sort sort by living by living up to some principle or other.
Of course, if there's some beatific end state of the sort we get in Western monotheistic religion, maybe there's a way of breaking up the dilemma. But of course that's not in the cards here. (After all, how fun would reading about a conflict be if one of the teams has an omnipotent player? Talk about over-leveled!)
Anyways...I don't know if this theme strikes other readers, or if it's just me. Does SE provide a way out later on?