A system of opinions which, being founded on a system of accepted values, determines the attitudes and behavior of men with respect to desired objectives of development of the society, social group or individual. Adam Schaff (1967)
Humanism does not exist in itself, just as man taken in himself and for himself does not exist. Only concrete man exists, man set in a particular age, living in a particular country, belonging to a particular social class, representing a particular tradition and particular personal ideals. Adam Schaff (1947)