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So grateful was Theseus to Peirithos, his partner in the abduction, that when Peirithos wished to woo Persephon, the daughter of Zeus and Demeter, and summoned him to the descent into Hades to obtain her, when Theseus found that he could not by his warnings dissuade his friend, although the danger was manifest he nevertheless accompanied him, for he was of opinion that he owed this debt1 of gratitude—to decline no task enjoined by Peirithos in return for his help in his own perilous enterprise.
1 For the figure of speech in ἔρανος see Isoc. 11.1 and Plat. Sym. 177c.