Plato, Laws 731d

δὲ τὸν μὲν ἰάσιμα ἔχοντα ἐγχωρεῖ καὶ ἀνείργοντα τὸν θυμὸν πραΰνειν καὶ μὴ ἀκραχολοῦντα γυναικείως πικραινόμενον διατελεῖν, τῷ δʼ ἀκράτως καὶ ἀπαραμυθήτως πλημμελεῖ καὶ κακῷ ἐφιέναι δεῖ τὴν ὀργήν· διὸ δὴ θυμοειδῆ πρέπειν καὶ πρᾷόν φαμεν ἑκάστοτε εἶναι δεῖν τὸν ἀγαθόν.πάντων δὲ μέγιστον κακῶν ἀνθρώποις τοῖς πολλοῖς ἔμφυτον ἐν ταῖς ψυχαῖς ἐστιν, οὗ πᾶς αὑτῷ συγγνώμην ἔχων

possessing it all his life long. Now while in general the wrong-doer and he that has these evils are to be pitied, it is permissible to show pity to the man that has evils that are remediable, and to abate one’s passion and treat him gently, and not to keep on raging like a scolding wife; but in dealing with the man who is totally and obstinately perverse and wicked one must give free course to wrath. Wherefore we affirm that it behoves the good man to be always at once passionate and gentle. There is an evil, great above all others, which most men have, implanted in their souls, and which each one of them excuses in himself and makes no effort to avoid.