Ericsson notes that for a novice, somewhere around an hour a day of intense concentration seems to be a limit, while for experts this number can expa… - Cal Newport

Sertillanges seems to have been ahead of his time, arguing in The Intellectual Life, “Men of genius themselves were great only by bringing all their power to bear on the point on which they had decided to show their full measure.” Ericsson couldn’t have said it better.)

You’re either remarkable or invisible,” says Seth Godin in his 2002 bestseller, Purple Cow.

As digital technology reduces the need for labor in many industries, the proportion of the rewards returned to those who own the intelligent machines is growing. A venture capitalist in today’s economy can fund a company like Instagram, which was eventually sold for a billion dollars, while employing only thirteen people. When else in history could such a small amount of labor be involved in such a large amount of value?