The word mystical is derived from the Greek mystikos meaning "secret," and muo meaning "concealed." Why all the mystery? Why is it concealed? Why do people keep it a secret? This seems like shady business. But is it?
Joannes Stobaeus was a 5th-century AD compiler of Greek texts in Stobi, Macedonia. He likely read widely, and recorded many of the most interesting passages he came across from Greek authors, including poets and prose writers. The following seems to be a reference to the ancient Mysteries, religious rites, secret ceremonies and initiations, and what took place in them, perhaps a reference to the Eleusinian Mysteries