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Δῶς μοι πᾶ στῶ καὶ τὰν γᾶν κινάσω → Give me a place to stand on, and I will move the Earth.
firmemente
ἑδραίως: ἐπίρρ. στερεῶς, ἰσχυρῶς, ἐπιμόνως, Ἡρωδιαν. 3. 14, 10 κλ.