I'm still not convinced. I had a bought with (suicidal) depression for several years (brain injury) and it's true that I didn't take credit for things I didn't

I'm still not convinced. I had a bought with (suicidal) depression for several years (brain injury) and it's true that I didn't take credit for things I didn't do, but instead I blamed myself for everything, even things way beyond my control (e.g. "It happened this way because you deserve to be miserable"). Many things I evaluated to being beyond me, and sure enough they were. Because having convinced myself I couldn't do it or wasn't worthy, any effort I made was half-hearted or actually negative. Which lead to more depression. Now maybe I'm too optimistic about what I can do sometimes, but I think you get further that way because sometimes you talk yourself into things that "on paper" should have been beyond you. Maybe I was more accurate before. But it was because I was skewing the results. Also note that it's easier to think you can't do something and then fail when you could have succeeded than to think you can do something and succeed when you otherwise would not (i.e. it's easier for your own belief to skew results on the negative side than the positive).