There's a line somewhere near the bottom that says: "Once you’ve mastered something and have reached a level of the highest success, you can overlap and begin

There's a line somewhere near the bottom that says: "Once you’ve mastered something and have reached a level of the highest success, you can overlap and begin to take on something else." I don't think you or the author is wrong here, but it's more of a case of giving sufficient attention to something and that thing alone before you attempt the next thing. Kanye just made beats until he was making beats for Jay etc., then dominated with his own records; the fashion successes have only come in the last 3 or so years. Elon cashed out with software a couple of times before the other stuff (which admittedly comes thick and fast - but he has the luxury of people to help now). Clooney was a successful (and wealthy) actor before the entrepreneurial stuff. I don't know enough about da Vinci, but perhaps he was a true multitasking polymath :-) I think every later step is easier when you have past successes (and usually money!) behind you. I'm absolutely sure there are people who can multitask mastery, but my take from the article was for most of us it's better to properly focus on a single something until you reach whatever you define 'success' in that area as before you leverage that into the next thing.