ποταμῷ γὰρ οὐκ ἔστιν ἐμβῆναι δὶς τῷ αὐτῷ → it is impossible to step twice in the same river, you cannot step twice into the same rivers
mĕsē: ēs, f., = μέση,
I the middle note, the note A, Vitr. 5, 4, 5; 5, 5, 2.
(1) mĕsē, ēs, f. (μέση), mèse, note du médium dans la musique grecque : Vitr. Arch. 5, 4 ; 5, 5.
