οὐκ ἔστι σιγᾶν αἰσχρόν, ἀλλ' εἰκῆ λαλεῖν → keeping silence is not shameful; speaking at random is (Menander)
Staatswissenschaft, ratio civilis. rei publicae gerendae ratio et prudentia (Staatskunde). – civitatis constituendae doctrina (Staatslehre).