Plato, Epinomis 978d

φαίνοιτʼ ἄν; καὶ ἑλίττων δὴ ταῦτα αὐτὰ ὅταν μὴ παύηται πολλὰς μὲν νύκτας, πολλὰς δὲ ἡμέρας οὐρανός, οὐδέποτε παύεται διδάσκων ἀνθρώπους ἕν τε καὶ δύο, πρὶν ἂν καὶ ὁ δυσμαθέστατος ἱκανῶς μάθῃ ἀριθμεῖν· ὡς γὰρ καὶ τρία καὶ τέτταρα καὶ πολλά, ἕκαστος ἡμῶν ἐπινοήσειεν ἂν ὁρῶν ταῦτα. καὶ ἐκ τούτων ἓν ἐποίησεν τὴν σελήνην ὁ θεὸς ἀπεργασάμενος, ἣ τοτὲ μὲν μείζων φαινομένη, τοτὲ δʼ ἐλάττων, διεξῆλθεν

lies before him. And so the heaven, revolving these very objects for many nights and many days, never ceases to teach men one and two, until even the most unintelligent have learnt sufficiently to number; for that there are also three and four and many, each of us must further conceive on seeing those objects. And God made one thing that he wrought from them, the moon, which shows herself at one time larger, at another smaller, and runs her course,