TEXNH PHTOPIKH (Rhetorics by Aristotle), Aristoteles (ca. 329-323 B.C.), Book I, Chapter 13, 1374b19-23

καὶ τὸ μᾶλλον λόγῳ ἐθέλειν κρίνεσθαι ἢ ἔργῳ. καὶ τὸ εἰς δίαιταν μᾶλλον ἢ εἰς δίκην βούλεσθαι ἰέναι· ὁ γὰρ εἰς διαιτητὴς τὸ ἐπιεικὲς ὁρᾷ, ὁ δὲ δικαστὴς τὸν νόμον· καὶ τούτου ἔνεκα διαιτητὴς εὑρέθη, ὅπως τὸ ἐπιεικὲς ἰσχύῃ. περὶ μὲν οὖν τῶν ἐπιεικῶν διωρίσθω τὸν τρόπον τοῦτον.

Book I, Chapter 13

[It bids us] settle a dispute by negotiation and not by force; to prefer arbitration to motion-for an arbitrator goes by the equity of a case, a judge by the strict law, and arbitration was invented with the express purpose of securing full power for equity.

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