Absolute validity would be confined to platitudes, logical or mathematical truths, and the like: the sort of beliefs nobody wants to argue about because they are neither controversial nor central to anyone’s sense of who she is or what she lives for. All beliefs which are central to a person’s self-image are so because their presence or absence serves as a criterion for dividing good people from bad people, the sort of person one wants to be from the sort one does not want to be. A conviction which can be justified to anyone, which even bad people can be argued into accepting, is of little interest.
I find this paragraph intensely interesting for reasons I can't even articulate yet. So I'm just going to set it down here and stare at it for a while.