The culture in multiculturalism seems to boil down to restaurant and pop (i.e industrial) culture choices. If it is anything beyond that, it is utilitarianism: the rule of numbers, economics. Capitalism in other words. Any attempt to assimilate the cultural change happening today to that of the past, or to validate it by what happened in the past, is fraud and diversion.
Ἄρρητον means "what is not to be spoken". I'd say the maxim is purposely ambiguous rather than baffling. It could mean "shameful", "horrible", or "sacred".
In high school I thought Hamlet was a comedy. All the characters seemed deluded to the point of foolishness. The ending is a perfect comedy of errors. My feeling was good riddance!
Comedy and Tragedy are a matter of perspective. I've seen Titus Andronicus performed as a comedy (And also as a comedy cooking show) - what seems dramatic can also seem melodramatic as a matter of portrayal. The darkest of realities can be the lightest of jokes, ever heard a dead baby joke? Likewise, most good comedy has a serious core at it's center. I have no doubt that by changing the stakes slightly, Caddyshack could be a serious statement on the human condition: Make the scholarship the make-or-break for Danny's college chances, put Spackler on the edge of feeding his kids. Comedy and Tragedy are simply how much distance we put between ourselves and the characters.
"Kirk and Raven" is the standard textbook in English. Gives and discusses the principal testimonia and fragments in the original Greek (or Latin) with English translations.
That was Milton Friedman's view.