"It plays a trick on us play is behavior that's not goal-directed but that gives us the ability to become goal-directed."
"Even when we are in good health, our critical inner voice tries to turn us against ourselves by fostering inwardness, distrust, self-criticism, self-denial and a generalized retreat from our goal-directed activities."
"Specifically, the amount of grey matter in the orbitofrontal cortex was reduced in people with cocaine addiction, an area involved in decision-making and goal-directed behaviour."