The ability to move past things is a direct measure of future success.
How long will you keep working on that project that has zero evidence of success potential? How long will you continue with the same strategy when everything around is telling you it’s wrong? How many excuses will you come up with to motivate keeping in the team a person who is no longer the right fit? How far will you push your regret for that promotion you have not been granted against everyone’s expectations? How much is the last big failure going to impact the way you approach your next responsibility?
We have the impression that by sticking to things, plans, ideas, people we commit to them, and if we do that long enough, we will make them better. More often, that is just an excuse, an easy way to hide behind the power of sunk costs and limited possibilities.
Once you have determined that you’ve given the situation your 100%, and yet it is still not working, move past that. It’s not being cold and heartless, it’s not jumping from one opportunity to the next, it’s not a selfish act. It’s allocating the limited resources you have at your disposal at any given time. When you do that by focusing mostly on the past, chances are the future will look grim.