There are several diseases of the memory. Forgetfulness of nouns, for instance, or of numbers. Or there are more complex amnesias. With one, you can lose your entire past; you start afresh, learning how to tie your shoelaces, how to eat with a fork, how to read and sing. You are introduced to your relatives, your oldest friends, as if you've never met them before; you get a second chance with them, better than forgiveness because you can begin innocent. With another form, you keep the distant past but lose the present. You can't remember what happened five minutes ago. When someone you've known all your life goes out of the room and then comes back in, you greet them as if they've been gone for twenty years; you weep and weep, with joy and relief, as if at a reunion with the dead. I sometimes wonder which of these will afflict me, later; because I know one of them will. For years I wanted to be older, and now I am.