All the new thinking is about loss. In this it resembles all the old thinking. The idea, for example, that each particular erases the luminous clarity of a general idea. That the clown- faced woodpecker probing the dead sculpted trunk of that black birch is, by his presence, some tragic falling off from a first world of undivided light. Or the other notion that, because there is in this world no one thing to which the bramble of blackberry corresponds, a word is elegy to what it signifies. We talked about it late last night and in the voice of…