" In one recent experiment, Damasio and his colleagues had subjects listen to stories describing people experiencing physical or psychological pain. The subjects were then put into a magnetic resonance imaging machine and their brains were scanned as they were asked to remember the stories. The experiment revealed that while the human brain reacts very quickly to demonstrations of physical pain-when you see someone injured, the primitive pain centers in your own brain activate almost instantaneously- the more sophisticated mental process of empathizing with psychological suffering unfolds much more slowly. It takes time, the researchers discovered, for the brain "to transcend immediate involvement of the body" and begin to understand and to feel "the psychological and moral dimensions of a situation." (p220) "

― Nicholas Carr , The Shallows: What the Internet Is Doing to Our Brains