 23 minutes to get back to the level of focus you had before. So I could look at my text now, right? My phone is the other side of my laptop. You think, oh, it'll take me five seconds to look at my phone and reply, right? But bear in mind, it takes you five seconds plus the 23 minutes it takes you to refocus your mind. But most of us never get 23 minutes without being interrupted. One other person who helped me to think about this, I went to interview one of the leading neuroscientists in the world, an amazing guy named Professor Earl Miller. He said to me, look, there's one thing you need to understand about the human brain