One Bad Apple

I was working on a crossword puzzle and had entered an incorrect word. I was having a difficult time coming up with answers that would work in the surrounding boxes. It occurred to me that in the "bigger picture", if I am convinced of a thought or belief and if that thought or belief is inappropriate or not working for me, I am limiting the possibilities that might be helpful to me. Not that I have a lifelong habit of beating a dead horse or anything... Hand me an eraser, please.