Mastery and Flow

There's a lot of focus on flow states at the moment. I don't believe you can separate flow from mastery, pressure and meaning. Clyde Brolin once reported that F1 drivers such as Schumacher and Hamilton would drop 10% if they were intellectually thinking about their braking spots and when to turn in. What's the 10% you're losing by being in your mind too much? Create more flow states by surrendering intellectual control and embodying your mastery.