A woman approached Picasso in a restaurant, asked him to scribble something on a napkin, and said she would be happy to pay whatever he felt it was worth. Picasso complied and then said, â€œThat will be $10,000.â€
â€œBut you did that in thirty seconds,â€ the astonished woman replied.
â€œNo,â€ Picasso said. â€œIt has taken me forty years to do that.â€
Source: What They Don’t Teach You at Harvard Business School by Mark H. McCormack