@wildfirewonder
This 'resilience' bullshit is very similar to the rubbish that you can 'beat cancer' if you just fight hard enough.
Yes, but a positive mindset, attitude, may not "cure" cancer, but may improve your life whilst undergoing treatment, etc., i.e. healthy living, staying fit, healthy eating, etc all help your body cope with the treatments (chemotherapy, radiotherapy), helps your body tolerate the drugs you have to take to combat the side effects, etc. Your treatments may have a better impact if you can tolerate them better and, yes, may "cure" your cancer at that time and put you into remission.
No one sane would say that you can "cure" cancer by wishing it away, it's more that a positive attitude will help you get through the treatment better, encourage you to eat healthily rather than say "sod it I'll have another cake", encourage you to exercise when you really don't feel it rather than say "sod it, I'll blob on the sofa rather than going for a walk", etc.
Realistically, your prognosis is likely to be better if you don't retreat into yourself, get depressed, which in itself makes you less inclined to eat healthily, exercise, etc. Of course, that's not to say that people who have a positive attitude don't die of cancer. It's just saying that by being positive, your chances of survival are almost certainly higher than someone who gets morbidly depressed about the diagnosis, so much so, that the body can't tolerate the treatment or isn't as responsive to treatment being it's run down.
One of my closest friends was diagnosed with cancer and it caused her mental health issues, so much so, that she refused to start treatment (in fact she was close to being sectioned at one stage), and by the time that she'd got her head around it, the cancer has spread too far, and the treatment couldn't go ahead. If she'd started treatment on time, the prognosis had been quite good.