I have never been a fan of organized religion, though I do consider myself quite spiritual, especially over the past 2 decades or so, when I overcame some personal adversity, raised a son and entered my cancer battle.
Regardless of what form a higher power takes, it is incumbent upon me to take the action necessary to maximize my chances of recovery, just as Brian and Gary alluded to. I have no control over the reactions of others, and I have been subjected to everything from loving support to benign neglect to being warned that my cancer was indeed a punishment for my past sins.
I volunteer every Monday at the local CCC where I was treated, specifically on the floors where Head & Neck cancer patients are predominantly treated. I am vigilant in my follow up appointments, and try to eat, drink and do the right things on a daily basis. I should drink more water, less coffee. I should exercise more. However, I make a concerted effort. That is all I (or any of us can do).
I have learned that I cannot control results. I have the power to do my best with what is in front of me at the moment. I also have the power to control the way I react to things that happen around me. That's it. So whether it is a prayer chain, an over-zealous pastor, supporting friends or friends too scared by mortality to deal with the facts, I can't let any of them distract me from taking the actions I need to take. I can make my experience more or less pleasurable, in direct proportion to the degree I let others dictate my peace of mind.