Passage: A central theme of cultural expression is to take the best from the past and discard capitalist elements. Popular, vernacular styles and themes in literature, art, music, and dance are esteemed as expressing the truly unique spirit of the Korean nation. Ethnographers devote much energy to restoring and reintroducing cultural forms that have the proper proletarian or folk spirit and that encourage the development of a collective consciousness. Lively, optimistic musical and choreographic expression are stressed. Group folk dances and choral singing are traditionally practiced in some but not all parts of Korea and were being promoted throughout North Korea in the early 1990s among school and university students. Farmers' musical bands have also been revived.

Question: What is one of the themes of cultural expression?
take the best from the past and discard capitalist elements