"It is irrelevant in that ethnies arc constituted, not by lines of physical descent, but by the sense of continuity, shared memory and collective destiny, i.e. by lines of cultural affinity embodied in distinctive myths, memories, symbols and values retained by a given cultural unit of population. In that sense much has been retained, and revived, from the extant heritage of ancient Greece. For, even at the time of Slavic migrations, in Ionia and especially in Constantinople, there was a growing emphasis on the Greek language, on Greek philosophy and literature, and on classical models of thought and scholarship. Such a ‘Greek revival’ was to surface again in the tenth and fourteenth centuries, as well as subsequently, providing a powerful impetus to the sense of cultural affinity with ancient Greece and its classical heritage. This is not to deny for one moment either the enormous cultural changes undergone by the Greeks despite a surviving sense of common ethnicity or the cultural influence of surrounding peoples and civilizations over two thousand years. At the same time in terms of script and language, certain values, a particular environment and its nostalgia, continuous social interactions and a sense of religious and cultural difference, even exclusion, a sense of Greek identity and common sentiments of ethnicity can be said to have persisted"