things are the right things. >> larry: fooling your brain? >> your brain fools you. so for instance, my patients, once they get sober, they say, i got it, i'm sober. but i've been thinking about joe. joe, of course, lived right next to my crack dealer. the fact is, that kind of thinking emerges always in addiction. so the systems that we use to rely upon for something we call will, actually become at the service of the deeper brain systems to which we are completely helpless. >> larry: since drug addiction, drugs are illegal, is there a criminal mind to the brain? you know you're doing wrong, not only for the addiction, but you would even steal it? >> one part of the brain we have to talk about. when we talk about addiction or will power is the front part of the brain. so the front third of the brain, prefrontal cortex, are larger in huma