Why does my self-worth depend on how work went today?

You have handed your sense of worth to your work day, and it pays you back in wild swings. A good meeting and you feel solid, one mistake and you are worthless by evening. That is an exhausting way to live, because it means a single ordinary day at the office can decide whether you are allowed to feel like a decent human being by nightfall. The problem is not that you care about your work. It is that you have made the work the sole judge of your value, and the work is a harsh, forgetful judge that resets every morning. A worth that can be destroyed by one bad hour was never really worth at all. It was a scoreboard, and scoreboards are not the same as who you are. Start building your sense of self on ground the work cannot touch. Each evening, name one thing you value about yourself that has nothing to do with performance, a kindness, a relationship, a quiet effort. It will feel thin at first. Kept up, it slowly gives you a floor that does not fall out from under you every time work goes wrong.