There is something to be said for positive thinking, but that doesn't mean we should ignore the bad things. It is not good to be blind.
I think relaxation is more important that positive thinking, at least for MG.
If we ignore the bad how are we supposed to make it better.
I've found that sometimes it feels good to admit just how bad I feel, usually it ends up being helpful because it is easy to ignore some things, because I keep hoping I am not as bad as I am. I end up with a realistic view of my health and it is easier to proceed with reality.
Sinking, I like that word for positive thinking when it means we are ignoring the real situation. Sinking = thinking that involves ignoring all the bad and focusing only on the good.