ξένος ὢν ἀκολούθει τοῖς ἐπιχωρίοις νόμοις → as a foreigner, follow the laws of that country | when in Rome, do as the Romans do
θυροπόρτιν, τὸ (Μ)η πόρτα.[ΕΤΥΜΟΛ. < θύρα + πόρτ-ιν (< πόρτα)].