My mother never liked Mother's Day. She thought it was a fake holiday dreamed up by Hallmark to commodify deep sentiments that couldn't be expressed with a card.

I wasn't prepared for the fact that grief is so unpredictable. It wasn't just sadness, and it wasn't linear. Somehow I'd thought that the first days would be the worst and then it would get steadily better - like getting over the flu. That's not how it was.

Many researchers say the dominant emotion experienced after loss is yearning or searching. And while you might feel more anger early on, it's accompanied by a whole host of other feelings.

The truth is, I need to experience my mother's presence in the world around me and not just in my head.

Grief is a bad moon, a sleeper wave. It's like having an inner combatant, a saboteur who, at the slightest change in the sunlight, or at the first notes of a jingle for a dog food commercial, will flick the memory switch, bringing tears to your eyes.

One of the grubby truths about a loss is that you don't just mourn the dead person, you mourn the person you got to be when the lost one was alive. This loss might even be what affects you the most.

Yet the story of Orpheus, it occurs to me, is not just about the desire of the living to resuscitate the dead but about the ways in which the dead drag us along into their shadowy realm because we cannot let them go. So we follow them into the Underworld, descending, descending, until one day we turn and make our way back.