Greiving is like an altered state

Mourning is like an altered state of being and grief has to be endured.
The following is from The Long Goodbye, The moment I heard my mother's diagnosis. By Meghan O'Rourke

The clinical literature on grief is extensive. Much of it reinforces what even the newish mourner has already begun to realize: Grief isn't rational; it isn't linear; it is experienced in waves. Joan Didion talks about this in The Year of Magical Thinking, her remarkable memoir about losing her husband while her daughter was ill: "[V]irtually everyone who has ever experienced grief mentions this phenomenon of waves," she writes. She quotes a 1944 description by Michael Lindemann, then chief of psychiatry at Massachusetts General Hospital. He defines grief as:

sensations of somatic distress occurring in waves lasting from twenty minutes to an hour at a time, a feeling of tightness in the throat, choking with shortness of breath, need for sighing, and an empty feeling in the abdomen, lack of muscular power, and an intensive subjective distress described as tension or mental pain.

Intensive subjective distress. Yes, exactly: That was the objective description I was looking for. The experience is, as Lindemann notes, brutally physiological: It literally takes your breath away. This is also what makes grief so hard to communicate to anyone who hasn't experienced it.
One thing I learned is that researchers believe there are two kinds of grief: "normal grief" and "complicated grief" (which is also called "prolonged grief"). Normal grief is a term for the feeling most bereaved people experience, which peaks within the first six months and then begins to dissipate. ("Complicated grief" does not—and evidence suggests that many parents who lose children are experiencing something more like complicated grief.) Calling grief "normal" makes it sound mundane, but, as one researcher underscored to me, its symptoms are extreme. They include insomnia or other sleep disorders, difficulty breathing, auditory or visual hallucinations, appetite problems, and dryness of mouth.

Researchers at Yale recently conducted an extensive study of bereavement and found that Kübler-Ross' stages were more like states. While people did experience those emotions, the dominant feeling they experienced after a death was yearning or pining
I thought this was an interesting article.