I'm sure I don't have to tell you what grief is. Looking at the below definitions I'm sure we'd agree, ITS MUCH, MUCH WORSE than they could possibly describe.
Definitions of Grief on the Web:
Deep mental anguish, as that arising from bereavement.
Intense sorrow caused by loss of a loved one (especially by death)
Grief is a multi-faceted response to loss, particularly to the loss of someone or something to which a bond was formed.
Deep, prolonged mental anguish over a loss.
Intense emotional suffering caused by loss, disaster, misfortune, etc; extreme sorrow; deep sadness
Pain of mind on account of something in the past; mental suffering arising from any cause, as misfortune, loss of friends, misconduct of one's self or others, etc.
The emotional pain or anguish that someone feels after the loss of a loved one.
WHY DO WE EXPERIENCE GRIEF?
The reason we experience grief is because we love. Period. If we didn't have love and connections we wouldn't grieve. Think about people you don't really know that died. You may feel bad for their family and friends, but you don't know the person so it doesn't effect you. However, take someone close to you that dies? A person that you love and cherish and probably have spent many years with? The pain of grief can be crippling. Most of us who have felt grief agree that we'd rather have a limb cut off then to lose someone we love. At least we know physical pain eventually heals. Healing from grief has no guarantees...it could take 6 months, it could take years. We all grieve and heal in different time.
There is a physical reason for grief: In relationships, (humans as well as animals) our body and our subconscious mind get 'used to' the sounds, touch, sight and smell of another person. This is done through chemicals present in our bodies. Such emotional memories are mediated through neuro-peptides. When we are in the presence of such a person, a particular cocktail of neuro-transmitters and hormones is produced. This forms a physiological identity of the other person in the body, and a bond is created. When the person dies, we no longer can experience that person alive and those neurotransmitters and hormones are not produced. Now, the 'physiological identity' of the dead person is mismatched because of the conditioning of the body to see the person alive. So the neuro-endocrine system goes into a turmoil. Depending on the degree of the bond, the body may go into shock. Memory fails, perception gets over-exaggerated, fear, anger, disbelief, denial, and sadness sets in, all part of the grieving process. Crying is an integral part of this process. One day the weeping and the grieving will end, at that point the body becomes emotionally and physiologically stable and calms down. Grieving is then over.
I chose to include the technical aspect of grief so you can be gentle on yourself and your loved ones who may be grieving. The body has no choice but to grieve no matter if you feel you should or shouldn't feel a certain way. YOU HAVE NO CHOICE IN THE MATTER OF GRIEVING OR NOT.
What you do have a choice in is how you handle your grief.