> Or put another way, I've always felt that by 25 you are who you will be. This is definitely wrong. Take almost any CEO and at 25 their careers are pretty cl

> Or put another way, I've always felt that by 25 you are who you will be. This is definitely wrong. Take almost any CEO and at 25 their careers are pretty close to pretty much every middle manager at any other big corp. There are of course outliers, but start with Tim Cook and just go down the list. By 35 most people have their trajectory starting to lock, but there are also many 35 year olds who's destiny is far from certain.