39) in what ways has cancer changed your thinking?

I guess it's a tie.
1) assisted suicide

I definitely was in favor of it and remain so, but I can see all sorts of problems now.
Basically, you want to do it before you get too ill or rather too close to being too ill. If you wait too long, you leave your relatives with a hard task to accomplish. And of course, if you don't wait too long, you run the risk of leaving too soon.

and then there's the wrinkle of one's spouse and relatives. Following the paths of others with cancer, it seems clear that spouses can have different ideas about the proper course. In some instances, the spouse thinks the person with cancer should "tough it out". "How can you leave me?"

What a mess.

2) survivor's guilt
boy, I'd heard soliders speak of this, but I never "got it". Before I felt like, "gee, why would you feel bad about something that didn't happen to you? Heck, what good would it do the dead guy for you to be dead, too".

I don't know what it is, but to see others with cancer get a much tougher hand to play just leaves you feeling empty. I don't know how to describe it. Just somehow, it doesn't seem so unfair that I have cancer. What seems so unfair is that I've got it but am playing a better hand than others. Maybe it's the bond you feel with the other folks with cancer. I don't know how to describe it. But it's a damn empty feeling.

Some of it is that it is frightening. You realize that "hey, that could be me", which morphs into "Hey, that will be me".

I guess to say cancer has changed my thinking would include that it has confused it.