Angela Duckworth said in her Ted Talk that IQ is just a small small percent of of how well you will do in life. What really matters is how much grit you have. If you have a low IQ but a lot of grit you will stick through with the things that are hard and you will do very well in life because you will stick with things.

Will Smith said that you can’t just have grit. You have to find grit in yourself.