Just came across this, and I disagree 100%
anyone can be a professional basketball player (you don't need to be 6' something. There are 5' something player who do extremely well)
the point is when they believe they can do anything they will work hard at it. It's not a magic pill you swallow that helps you, through hard work and perseverance you can reach the sky. It's limiting beliefs like that that hinder kids and their infinite potential!