21st Century Classical Greek -- a verb and some vocabulary

Book I section 41.

‘δικαιώματα μὲν οὖν τάδε πρὸς ὑμᾶς ἔχομεν ἱκανὰ κατὰ τοὺς Ἑλλήνων νόμους, παραίνεσιν δὲ καὶ ἀξίωσιν χάριτος τοιάνδε, ἣν οὐκ ἐχθροὶ ὄντες ὥστε βλάπτειν οὐδ᾽ αὖ φίλοι ὥστ᾽ ἐπιχρῆσθαι, ἀντιδοθῆναι ἡμῖν ἐν τῷ παρόντι φαμὲν χρῆναι.

[2] νεῶν γὰρ μακρῶν σπανίσαντές ποτε πρὸς τὸν Αἰγινητῶν ὑπὲρ τὰ Μηδικὰ πόλεμον παρὰ Κορινθίων εἴκοσι ναῦς ἐλάβετε: καὶ ἡ εὐεργεσία αὕτη τε καὶ ἡ ἐς Σαμίους, τὸ δι᾽ ἡμᾶς Πελοποννησίους αὐτοῖς μὴ βοηθῆσαι, παρέσχεν ὑμῖν Αἰγινητῶν μὲν ἐπικράτησιν, Σαμίων δὲ κόλασιν, καὶ ἐν καιροῖς τοιούτοις ἐγένετο οἷς μάλιστα ἄνθρωποι ἐπ᾽ ἐχθροὺς τοὺς σφετέρους ἰόντες τῶν ἁπάντων ἀπερίοπτοί εἰσι παρὰ τὸ νικᾶν:

[3] φίλον τε γὰρ ἡγοῦνται τὸν ὑπουργοῦντα, ἢν καὶ πρότερον ἐχθρὸς ᾖ, πολέμιόν τε τὸν ἀντιστάντα, ἢν καὶ τύχῃ φίλος ὤν, ἐπεὶ καὶ τὰ οἰκεῖα χεῖρον τίθενται φιλονικίας ἕνεκα τῆς αὐτίκα.

This section mostly has some vocabulary that you’ve seen before.

Notice the hopos purpose clause in subsection 1.

Learn makros.

Go to Wiktionary and learn βοηθέω.

The last argument that the Korinthians make in this section is, again, unfortunate. The Kerkyraeans didn’t have a treaty with Athins, but they were not out and out enemies. The Korinthians had a treaty with Athins, but were threatening to become enemies if Athins helped the Kerkyraeans. Again, it’s shooting themselves in the foot to refer to how easily alliances can change; all it takes is the right circumstances.