From Sam Harris: You spot your best friend standing on the street corner looking strangely disheveled. You recognize that she is crying and frantically dialing her cell phone. Was she involved in a car accident? Did someone assault her? You rush to her side, feeling an acute desire to help. Your “self” seems to stand at the intersection of these lines of input and output. From this point of view, you tend to feel that you are the source of your own thoughts and actions. You decide what to do and not to do. You seem to be an agent acting of your own free will. The problem, however, is that this point of view cannot be reconciled with what we know about the human brain. All of our behavior can be traced to biological events about which we have no conscious knowledge: this has always suggested that free will is an illusion.