So which book are we talking about. we must have a clear definition so that we're talking about something specific it is not our mind. we can not think out of our minds it is a boundary within our minds the boundary between what we know and what we have in still or yet thought about what is our mind what is our knowledge structure is and emergent phenomenon out of the complex mechanism which is the brain we start with initial conditions our genetic heritage we have boundary condition the environment we have in direct experience years and years spent in school and university to lean what other people have thought what other people have discovered what other people have created and then we have our own direct experience our successes are faders that really make what we are all this build and Hill within which we live and will live very well in that and whatever we thing inside that on here that box we feel safe whatever it outside it is invisible to us we do not know what is outside that is why soul risky with something which is necessary to our dignity but actually it is very difficult to do