Rhetoric Section 12

ἔστι δʼ ἀπὸ τύχης μὲν τὰ τοιαῦτα γιγνόμενα, ὅσων ἥ τε αἰτία ἀόριστος καὶ μὴ ἕνεκά του γίγνεται καὶ μήτε ἀεὶ μήτε ὡς ἐπὶ τὸ πολὺ μήτε τεταγμένως (δῆλον δʼ ἐκ τοῦ ὁρισμοῦ τῆς τύχης περὶ τούτων),

Things which are the result of chance are all those of which the cause is indefinite, those which happen without any end in view, and that neither always, nor generally, nor regularly. The definition of chance will make this clear.

Relèvent du hasard toutes les choses dont la cause est indéterminée, qui se produisent sans aucune fin visée, et qui n'arrivent ni toujours, ni généralement, ni régulièrement. La définition du hasard le montrera clairement.