I think the albums (deliverance/damnation) are about a pregnant woman giving (or perhaps losing a baby) birth. You can see the shadow of a pregnant woman on the Damnation cover, and the title "Deliverance" is about the baby being born.It's very late and i'm tired so I don't know if this is making much sense, but i'm sure people can see what I mean by the following.
Damnation - About an unwanted pregnancy
Deliverance - About losing the baby (i.e. being delivered from damnation), Or having the baby.