Changing our behavior is a self-engineering challenge with few equals. I’m talking about long-term, sustained change, not short-run bursts that sputter out before real change happens. Whether the change involves diet, exercise, habits, dependencies, or anything else, changing behavior is one of the hardest things any of us will ever try to do. This is a well-researched area, and quite a lot is known about why sustained change is tremendously difficult. Here are eight of the primary reasons:
More here – Psychology Today
