There’s a psychological condition called ‘Imposter Syndrome’. It was first recognised back in the 1970s. At that time it was believed that only women seemed to suffer from it, but it isn’t sexist – it can affect anyone. Famous high achievers like Albert Einstein, Neil Gaimen, Terry Pratchett and Jim Carrey have all bowed under the condition, and if you are intelligent and a perfectionist the chances are you have too, at some point in your career.