“You don’t have the brain you want, you have the brain you’ve earned. Or to put it another way, you don’t have the brain you desire, you have the brain you deserve—based on how you’ve been operating it. Spend your days diverted by your devices, tethered to television and majoring in mindless pursuits and your brain will be weak and flabby through your mistreatment of it. Just like other muscles, it will atrophy. And this will result in weaker cognition, slower learning and lower processing power. Your competition will destroy you and your targets will elude you. On the other hand, when you use
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