The present thesis illustrates how metaphors can offer a glimpse into people’s worldviews; they can enable insights both into individuals’ and nation’s attitudes and beliefs. It is suggested, however, that in order to assure a greater validity of results a flexible methodological approach needs to be adopted, or, more precisely, a combination of methods is almost indispensable. A mixture of methods (corpus, sociocultural information gained from sociological studies and questionnaire) was applied in order to seek authentic ways of conceptualisation of the EU, but also ways of conceptualising of prevalent source domains in the EU debate.