My brother died 2 years ago after 4 years of horrific suffering. There is hardly a day that goes by without thinking of him. What can develop, it seems to me, is almost a death wish such as I want to be with him, or save him, or ease his pain, etc. Maybe guilt at being alive.
Then there is another aspect which makes me angry and determined that I will not go that way. So I actually believe (perhaps naively) that we can do much to prevent cancer. These cells are always present (so I've read) in our body, but our own immune system won't let them take over. So I am a fierce partner to my immune system. Eat well, exercise, maintain good weight and take Vit. C. Just some thoughts.