You have to be good, and also care, which is like effort. a lot of young people care or put effort into playing sports but most do not have the talent to make a living at it.
"Average intelligence and persistence has accomplished much more than genius"
For hard problems, high IQ is necessary but still insufficient. You are not going to solve a hard math problem with average IQ no matter how much persistence you throw at it.
"Average intelligence and persistence has accomplished much more than genius"
For hard problems, high IQ is necessary but still insufficient. You are not going to solve a hard math problem with average IQ no matter how much persistence you throw at it.