Kitap 30
8.6
Valentinian, who perhaps knew nothing of these instances, and did not consider that slowness to anger in rulers is always a solace for unhappy circumstances, increased the number of punishments by fire and sword, which a righteous spirit regards as the last resort in times of stress, as the splendid writer Isocrates says; Panath. 185, θαυμάζω δ᾽, εἴ τινες τὰς μάχας καὶ τὰς ϝίκας παρὰ τὸ δίκαιον γιγνομένας μὴ νομίζουσιν αἰσχίους εἶναι καὶ πλειόνων ὀνειδῶν μεστὰς ἢ τὰς ἥττας τὰς ἄνευ κακίας συμβαινούσας. there is an utterance of his for all time whereby he teaches that sometimes a ruler who has been overcome by arms ought to be pardoned, more than one who did not know what is just.
8.7
I think it was under the influence of this that Cicero made the glorious statement in his defence of Oppius:This speech of Cicero has not survived. and indeed, to have great power for the salvation of another has brought honour to many; to have had too little power to destroy him has never been a reproach to anyone.