οὐκ ἔστι σιγᾶν αἰσχρόν, ἀλλ' εἰκῆ λαλεῖν → keeping silence is not shameful; speaking at random is (Menander)
γᾰληνῶς: спокойно, безмятежно Diog. L.
serena, tranquilamente