Lovely article. There is one thing that sure helps to calm the “brain” down from those thoughts. And that is listening to people who are acclaimed successful and genius. Listening to them to notice what they don’t know and where you know better than they do. And there are lots of successful people both living and dead (whose records are still here in books, videos etc), that are honest. When you realize what they don’t know that you know, you can convince your “brain” that if these people don’t know something you know and they are successful, you can be successful too (since success is not about knowing it all).