For many of us, roughly 15% of our lives will be spent in the classroom, to learn, to widen our horizons, to get exposed to new idea & cultures, to deepen our knowledge, and fundamentally, to change our brains. Some athletes will train as much as 35 hours/week, to excel, to compete at world class levels, to master their craft, and fundamentally, to change their bodies (and this all starts in the brain).