My grandfather is dying... how can I comfort my mother? I have asked this question once already... but I need as many responses as I can get, I am at a loss for what to do.

My grandfather has Parkinson's disease and has been sick for most of my life. Just recently, he came down with a severe case of pneumonia, and has been in the hospital for the last few weeks. He has fluid in his lungs, can't breathe, and can barely speak... The doctors are saying that his choices are limited, and he is rapidly fading. it is breaking my mother's heart.

I want to comfort her, to say something that will ease her pain, but I can never find the right words... I know my grandfather is a Christian, and I want to tell her that he'll be happy and complete in heaven, but the words never come out right. She remembers him fit and healthy, but I do not. He's been sick for most of my life.

What can I say or do to help her cope?

Summarized question: How can I help my mother to cope up with emotional pain?