I know this is the boring way to answer, so I'll put it behind a spoiler to keep the appeal of treasure hunting :P
All the answers from the game files:
Mortals live to die. To be slaughtered.REALLY_DARK_URGE
Mine seems worth little, as my blood calls me to harm others.REALLY_DARK_URGE
No one life is worth more than any other. We are all equal.
That depends on a person's deeds.PALADIN = False
Life's only value is as currency. Doesn't matter to me otherwise.
Each life is of infinite value and merits sacrificing everything for.
The only life that matters is mine.
Depends on the mortal.TIEFLING = False
A life is only valuable in service to Vlaakith.REALLY_GITHYANKI
Life only has value where Lolth decrees it.REALLY_LOLTHDROWELF
Some mortals live much longer than others. I can't compare them.REALLY_ELF
In my experience, that depends on what the mortal looks like.REALLY_TIEFLING
A life is worth only as much as the legends remember it.BARD
Mortal lives are not 'single'. They are part of a greater whole - a path to enlightenment. MONK
That depends on the virtue of the life that is lived.PALADIN
There are no answers specific to a cleric of Kelemvor, but there are specific lines for both a cleric of Kelemvor or a cleric of Myrkul elsewhere in this conversation.
