δυνατὰ δὲ οἱ προύχοντες πράσσουσι καὶ οἱ ἀσθενεῖς ξυγχωροῦσιν → the strong do what they will; the weak do what they must | the strong do what they can and the weak suffer what they must | they that have odds of power exact as much as they can, and the weak yield to such conditions as they can get

[spiros]

δυνατὰ δὲ οἱ προύχοντες πράσσουσι καὶ οἱ ἀσθενεῖς ξυγχωροῦσιν → the strong do what they will; the weak do what they must | the strong do what they can and the weak suffer what they must | they that have odds of power exact as much as they can, and the weak yield to such conditions as they can get

Thucydides, History of the Peloponnesian War, 5.89
http://www.perseus.tufts.edu/hopper/text?doc=Perseus%3Atext%3A1999.01.0247%3Abook%3D5%3Achapter%3D89

Ο ισχυρός επιβάλλει όσα του επιτρέπει η δύναμή του και ο αδύναμος υποχωρεί όσο του επιβάλλει η αδυναμία του ( Θουκυδίδου Ιστορία Ε89)