「ポジティブシンキング」じゃなくてもOK？怒りや後悔などネガティブな気持ちにも意外なメリットがあると専門家 - GIGAZINE https://gigazine.net/news/20220717-positive-thinking-grumpy-moods-actually-useful/

Struggling with positive thinking? Research shows grumpy moods can actually be useful https://theconversation.com/struggling-with-positive-thinking-research-shows-grumpy-moods-can-actually-be-useful-185883