40.
Τοιοῦτος δὲ καὶ ὁ τῆς ψυχῆς ὅρος, εἰ ἀριθμὸς αὐτὸς αὑτὸν κινῶν ἐστι· καὶ γὰρ τὸ αὐτὸ αὑτὸ κινοῦν ψυχή, καθάπερ Πλάτων ὥρισται.Fragmenta. Xenocrates of Chalcedon. ed. Friedrich Wilhelm August Mullach. Paris. 1881.
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