It has been said it takes 10,000 hours of experience to become an expert. That is a lot of 40-hour work weeks!!
It has also been said the only thing we can be an expert in is ourselves. I don’t know if I buy in to this notion. I am 40 years old, I have been for a number of months now. I do not remember every single moment and event of my life. Does that mean I am no longer an expert even on myself?