"It is becoming increasingly realistic that Poland will disappear as a sovereign state" and be absorbed into a "European superstate" whose capital would be Brussels or Berlin, he said in a sermon on Polish Independence Day in Krakow Cathedral on Tuesday.
According to his archbishopric, Jedraszewski referred to the fact that 14 per cent of Poles allegedly hate their homeland.
In fact, according to a much-discussed study by the Psychology Institute of the Polish Academy of Sciences, 14 per cent of respondents said they were "ashamed" of Poland.
Poles should not stop working for and serving their country, said the Archbishop of Krakow.
At a mass in Warsaw, which was also attended by President Karol Nawrocki, Poland's military bishop Wieslaw Lechowicz also called for Poland to be remembered not only on public holidays.
Although Poland is an independent state, its compatriots must constantly take care of their country's freedom, said Lechowicz.
He spoke in favour of patriotism and at the same time warned against a feeling of superiority towards other peoples: "Building positive relationships with foreigners who are in Poland is also an expression of love for the homeland."
Independence Day commemorates the re-establishment of the Polish state in 1918 after the First World War. This marked the end of 123 years of foreign rule in Poland by the partitioning powers of Prussia and the German Empire, Austria-Hungary and Russia.