My mother likes odd numbers and is suspicious of the even ones. She reads a new book every week and is bewitched by black holes in the universe. She describes herself as an optimist but she worries about everything—worries incessantly—worries on behalf of others when she feels they are not worrying adequately for themselves.And my mother misses her own mother, my grandmother, immensely, who only has a past now; who is only allowed to be as we remember her.