Homer, Od. 6.181-185

“May the gods grant as much as you desire in your thoughts,
A husband and home, and may they give you fine likemindness,
For nothing is better and stronger than this
When two people who are likeminded in their thoughts share a home,
A man and a wife—this brings many pains for their enemies
And joys to their friends. And the gods listen to them especially”

σοὶ δὲ θεοὶ τόσα δοῖεν, ὅσα φρεσὶ σῇσι μενοινᾷς,
ἄνδρα τε καὶ οἶκον, καὶ ὁμοφροσύνην ὀπάσειαν
ἐσθλήν· οὐ μὲν γὰρ τοῦ γε κρεῖσσον καὶ ἄρειον,
ἢ ὅθ’ ὁμοφρονέοντε νοήμασιν οἶκον ἔχητον
ἀνὴρ ἠδὲ γυνή· πόλλ’ ἄλγεα δυσμενέεσσι,
χάρματα δ’ εὐμενέτῃσι· μάλιστα δέ τ’ ἔκλυον αὐτοί.

Plato, Republic, 1. 333d

“So, [Simonides] means that justice is helping your friends and hurting your enemies?”

Τὸ τοὺς φίλους ἄρα εὖ ποιεῖν καὶ τοὺς ἐχθροὺς κακῶς δικαιοσύνην λέγει;

Plato, Republic, 4. 433b

“And, really, justice is each person taking care of his own business and not meddling in too many things. We have heard this from many others and said it ourselves many times”

“Yes, we have said this.”

Then, I said, “so, then, justice runs the risk in some way of just being taking care of your own business?”

Καὶ μὴν ὅτι γε τὸ τὰ αὑτοῦ πράττειν καὶ μὴ πολυπραγμονεῖν δικαιοσύνη ἐστί, καὶ τοῦτο ἄλλων τε πολλῶν ἀκηκόαμεν καὶ αὐτοὶ πολλάκις εἰρήκαμεν. Εἰρήκαμεν γάρ. Τοῦτο τοίνυν, ἦν δ’ ἐγώ, ὦ φίλε, κινδυνεύει τρόπον τινὰ γιγνόμενον ἡ δικαιοσύνη εἶναι, τὸ τὰ αὑτοῦ πράττειν.

Plato, Gorgias 473a5

“Committing harm is worse than suffering it”

τὸ ἀδικεῖν τοῦ ἀδικεῖσθαι κάκιον εἶναι

Thucydides, 3.82.7-8

“To exact vengeance from someone was thought to be more important than not suffering at all. If oaths were ever taken in turn, were strong because each person was at a loss and had no power at all. But as soon as one of them had the advantage, he attached if he saw anyone unguarded: it was sweeter to take vengeance despite a pledge than to do so openly. It was thought generally to be safe and to have won a prize for intelligence, prevailing by deceit. Many wicked people become famous for being clever than good people do for being ingenuous. Men are ashamed by the latter but delight in the former.

To blame for all of these things the love of power and a love of honor. From both, they fell into a voluntary love of conflict. For those who were in charge of the state each claimed identities for themselves, some the equal rights of the masses, the others the wisdom of the aristocrats; while guarding the common goods in word, they were making them the contest’s prize, competing with one another to be pre-eminent, they dared the most terrible things—and they surpassed them with greater acts of vengeance too. They did not regard either justice or advantage for the city…”

ἀντιτιμωρήσασθαί τέ τινα περὶ πλείονος ἦν ἢ αὐτὸν μὴ προπαθεῖν. καὶ ὅρκοι εἴ που ἄρα γένοιντο ξυναλλαγῆς, ἐν τῷ αὐτίκα πρὸς τὸ ἄπορον ἑκατέρῳ διδόμενοι ἴσχυον οὐκ ἐχόντων ἄλλοθεν δύναμιν· ἐν δὲ τῷ παρατυχόντι ὁ φθάσας θαρσῆσαι, εἰ ἴδοι ἄφαρκτον, ἥδιον διὰ τὴν πίστιν ἐτιμωρεῖτο ἢ ἀπὸ τοῦ προφανοῦς, καὶ τό τε ἀσφαλὲς ἐλογίζετο καὶ ὅτι ἀπάτῃ περιγενόμενος ξυνέσεως ἀγώνισμα προσελάμβανεν. ῥᾷον δ’ οἱ πολλοὶ κακοῦργοι ὄντες δεξιοὶ κέκληνται ἢ ἀμαθεῖς ἀγαθοί, καὶ τῷ μὲν αἰσχύνονται, ἐπὶ δὲ τῷ ἀγάλλονται. πάντων δ’ αὐτῶν αἴτιον ἀρχὴ ἡ διὰ πλεονεξίαν καὶ φιλοτιμίαν· ἐκ δ’ αὐτῶν καὶ ἐς τὸ φιλονικεῖν καθισταμένων τὸ πρόθυμον. οἱ γὰρ ἐν ταῖς πόλεσι προστάντες μετὰ ὀνόματος ἑκάτεροι εὐπρεποῦς, πλήθους τε ἰσονομίας πολιτικῆς καὶ ἀριστοκρατίας σώφρονος προτιμήσει, τὰ μὲν κοινὰ λόγῳ θεραπεύοντες ἆθλα ἐποιοῦντο, παντὶ δὲ τρόπῳ ἀγωνιζόμενοι ἀλλήλων περιγίγνεσθαι ἐτόλμησάν τε τὰ δεινότατα ἐπεξῇσάν τε τὰς τιμωρίας ἔτι μείζους…