Carissa is trying to commit all that to memory so she can think about it in more detail later. Most people don't want to burn in the purifying flames of Hell - what does that mean? They would prefer it if they didn't in fact need much purifying? Sure, Carissa would prefer that too, that'd be awfully convenient, though she'd trade more purifying for coming out better on the other end - would most people not take that trade? 

Carissa is trying to commit all that to memory so she can think about it in more detail later. Most people don't want to burn in the purifying flames of Hell - what does that mean? They would prefer it if they didn't in fact need much purifying? Sure, Carissa would prefer that too, that'd be awfully convenient, though she'd trade more purifying for coming out better on the other end - would most people not take that trade? Are most clerics of Asmodeus not able to notice that it is good to suffer if you come out of the suffering improved? But it's very obvious!! She thinks she could even phrase it so Keltham agreed? We are all slaves of this world the way Pharasma made it - seems true -  presumably not heretical, to think of Pharasma as having made it - but also we would make it ourselves - but would we? Maybe we would make dath ilan, instead?