7. But those matters which they keep more secret than these, in regard to which they say that one upon first hearing them would be astonished, and, to use one of the written phrases in vogue among them, would be confounded, are in truth full of amazing things, and of madness and folly, being of such a sort that it is impossible not only to commit them to writing, but also for modest men even to utter them with the lips on account of their excessive baseness and lewdness.