The premise of the article is that people tend to diminish their happiness over success when it is finally achieved. So you achieve success and allow yourself only a little happiness if any at all. This explains the dull feeling people sometimes get after achieving success. As an example, let’s say you have an art journaler you respect, you decide you want to share work with that person (in their ning group) and you hope that someday that person takes notice and says something good about your work. FInally it happens and for a fleeting moment you feel good but you discount it by telling yourself, “Eh, it’s just one comment.” Or, “What she said wasn’t that great.” even though something good happened you let your inner critic diminish the impact.
Basically, the idea of the article is a good one about your inner critic and how to deal with it, which is a very Chapter 2 of JF365 type of thing. You should check it out.