What Cancer Can't DoCancer. Just the sound of the word fills our hearts with fear and dread. It's a terrifying diagnosis. For many of us, this disease threatens to rob us of our health, our energy, our vitality, and our sense of well-being. It endangers our ability to provide for ourselves and to take care of our families. It may steal our identity, our sense of purpose and significance. It can ruin our best-laid plans, destroy our hopes and dreams...