> We overestimate our short-term ability, but underestimate our long-term ability. In a short timeframe, this guy started a whole bunch of projects that he did

> We overestimate our short-term ability, but underestimate our long-term ability. In a short timeframe, this guy started a whole bunch of projects that he didn't finish. In the short term, he overestimates his long term ability. And perhaps he underestimated his short term ability because he's impressed with starting so many projects, more than he could finish with his overestimated long term abilities. but don't listen to me, glass half empty sounds optimistic ("I've identified the problem, I can see room for improvement! I know how to fix this!") and glass half full sounds like you're trying to convince yourself you don't need to do anything, that everything is going to be OK.