When you think about the brain, it's difficult to understand, because if I were to ask you right now, how does the heart work, you would instantly tell me it's a pump. It pumps blood. If I were to ask about your lungs, you would say it exchanges oxygen for carbon dioxide. That's easy. If I were to ask you how the brain works, it's hard to understand because you can't just look at a brain and understand what it is.
(Música) Si lo piensan, el cerebro es algo difícil de comprender porque si les pregunto cómo funciona el corazón, enseguida dirían que es una válvula que bombea sangre. Y si pregunto cómo funcionan los pulmones dirían que intercambian oxígeno por dióxido de carbono. Así de fácil. Pero si les pregunto cómo funciona el cerebro es difícil de comprender porque no se puede entender lo que es con sólo mirarlo.