How to Get to the Top of Your Field

I think you can only be world class at, potentially just one or two things. It reminds me of how people say you only have a couple start ups in your life. And often the things that you pursue are not hard on their own, but the sheer amount of fortitude and dedication that requires you to get to the top of your field is what most people don't want to engage with. So i know you played golf growing up and you got to high level. I'd love to learn a little bit more about all the work that had to go into that to get to that level.