Susan Sontag

To designate a hell is not, of course, to tell us anything about how to extract people from that hell, to moderate hell's flames. Still, it seems a good in itself to acknowledge, to have enlarged, one's sense of how much suffering caused by human wickedness there is in the world we share with others. Someone who is perennially surprised that depravity exists, who continues to feel disillusioned (even incredulous) when confronted with evidence of what humans are capable of inflicting in the way of gruesome, hands-on cruelties upon other humans, has not reached moral or psychological adulthood.
No one after a certain age has the right to this kind of innocence, of superficiality, to this degree of ignorance, or amnesia.