There comes a day when you start realizing why things consistently go the same way. You start seeing a pattern and start wondering how that pattern's come about. The explanation comes by recognizing the assumptions you have: the consistently inadequate amount of time you've spent on something, or the unreachable standard that you've set for yourself. Perfectionism is the ultimate negative thinking: the cup ain't full until it's perfectly full. No wonder perfectionists never feel satisfied with themselves! To be completely satisfied with ourselves we'd have to be perfect, and none of us are!