Sorrow, turns out to be not a state but a process. It needs not be a map but a history, and if I don't stop writing that history at some quite arbitary point, there's no reason why I should ever stop. There is something new to be chronicled every day.
Grief is like a long valley, a winding valley where any bend may reveal a totally new landscape but not every bend does. Sometimes the surprise is the opposite one: you are presented with exactly the same sort of country you thought you had left behind miles ago. That is when you wonder whether the valley isn't a circular trench. But it isn't. There are partial recurrences, but the sequence doesn't repeat.