In our post-Cartesian times human abilities are regarded as integrated and interacting abilities. Speaking, thinking, perceiving, having emotions need to be studied in interaction. Integration and interaction take place in dialogue. Scholars are called upon to go beyond reductive methods of abstraction and division and to take up the challenge of coming to terms with the complex whole. The conclusions drawn from reasoning about human behaviour in the humanities and social sciences have finally been proven by experiments in the natural sciences, especially neurology and sociobiology. What happens in the black box, can now, at least in part, be made visible.