When was the MHG in use?
Middle High German covers the years 1050 to 1350 CE.
And for us laymen, whence came MHG?
MHG came from OHG (Old High German) which in turn is a West Germanic language (along with English, Dutch, etc.). East Germanic (Gothic) and North Germanic (Danish, Icelandic, Faroese, etc.) come from a hypothetically (reconstructed) Proto-Germanic, which in turn came from Proto-Indo-European.
I haven't quite caught the connection of crucible with ego sum lux mundi (Koine Greek ἐγώ εἰμι τὸ φῶς τοῦ κόσμου· / egŏ eimi to phŏs tou kosmou). The composition of the Fourth Gospel is usually thought to be around 100 CE and the word crucible comes from the Middle Ages, perhaps a thousand years later. Are you saying that crux (Greek σταυρός stauros) as an instrument of capital punishment and a symbol of Christianity inspired the word crucible?
