>>12484778both, dumbass. there are plenty of smart people and plenty of industrious people, but much much fewer of both.
think about it; if 1 out of every 50 people are notably intelligent (130~ IQ/98 percentile) and 1 out of every 50 people are notably industrious, then the number of people that are both notably intelligent AND notably hardworking would be, roughly estimated, one out of every 5000 people.
by that metric, in the city of new york, with a population of 8.4 million, only 1,680 have what it takes to be successful.