In Cocteau's film Orpheus, the poet asks what he should do. "Astonish me", he is told. Very little of modern art does that -- certainly not in the sense that a great work of art can make you wonder how its creation was accomplished by a mere mortal.
I have that feeling with the cantata Carmina Burana. "A Human composed that?" (A mere mortal by the name of Carl Orff .)