Taking care of the elderly comes without the vast literature of advice and encouragement that accompanies other kinds of commitments, notably romantic love and childbearing. It sneaks up on you as something that is not supposed to happen, or rather you crash into this condition that you have not been warned about, a rocky coast not on the map. In the preferred stories the last years of life are golden and the old all ripen into wisdom, not decay into diseases that mimic mental illness and roll backward into chaotic childhood and beyond.