Insane… I thought I was smart, she proves me wrong.

Peter Norvig, Fabrice Bellard, etc. The list of ultra smart people is quite long. A friend of mine thought he was pretty smart (and I would have happily agreed with him). Then he went to work for Google (early days). It didn't take long for him to realize that the only reason he seemed very smart was that he simply wasn't seeing a large enough slice of humanity.