"It is important to feel the anger without judging it, without attempting to find meaning in it. It may take many forms: anger at the health-care system, at life, at your loved one for leaving. Life is unfair. Death is unfair. Anger is a natural reaction to the unfairness of loss."
Elisabeth Kubler-Ross was a Swiss-born American psychiatrist and author who helped pioneer modern hospice and end-of-life studies. She is widely associated with the five stages model of grief presented in On Death and Dying.