"It's only when we truly know and understand that we have a limited time on earth - and that we have no way of knowing when our time is up, we will then begin to live each day to the fullest, as if it was the only one we had."
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.