But the basic methods of rational evaluation are reliable aids to uncovering how to live well, and they are the only such aids that can be identified and taught. This is especially important in modern conditions, with 'fast changing technologies and free movement of labour [which calls for] an ability to cope with changing technological, economic and social conditions, for an ability to adjust, to acquire new skills, to move from one subculture to another, to come to terms with new scientific and moral views