
The article refers to the actual debate on the model of differentiated integration. According to the author, it should be assumed that further internal differentiation of the European Union (EU) has become a structural and essential element of the development of European integration. At the same time, it should be stressed that the fundamental core of EU reform revolves around the Eurozone. Membership of the Eurozone has a direct influence on the position of a state in the EU. The other important point of reference is the principle of democratic rule of law which is the basis for co-operation within the EU and its effectiveness. From this point of view, the author analyses the attitude of the present Polish government towards the EU: infringements of the rule of law and the negative attitude towards membership of the Eurozone will gradually weaken Poland’s international position and affect the quality of EU membership.