David Foster Wallace, from an 1993 interview with The Review of Contemporary Fiction:
I guess a big part of serious fiction’s purpose is to give the reader, who like all of us is sort of marooned in her own skull, to give her imaginative access to other selves. Since an ineluctable part of being a human self is suffering, part of what we humans come to art for is an experience of suffering, necessarily a vicarious experience, more like a sort of “generalization” of suffering. Does this make sense? We all suffer alone in the real world; true empathy’s impossible. But if a piece of fiction can allow us imaginatively to identify with a character’s pain, we might then also more easily conceive of others identifying with our own. This is nourishing, redemptive; we become less alone inside. It might just be that simple.