 However, it is quite clear that, even if the story about the reduction of the soul to numbers stems from Xenocrates’ On Nature, the numerical reduction was supposed by Themistius not to be Xenocrates’, but (perhaps) Plato’s. Aristotle and Themistius both give separate mention to the account of the soul that is traditionally ascribed to Xenocrates: that it is a self-moving number (De anima 408b32–33; Themistius in 12.30–33; the ascription to Xenocrates is supported by a large number of texts gathered as frs. 60H, 165–187IP: e.g., Alexander of Aphrodisias on Aristotle’s Topics, Wallies 1891, 162.17). Both Aristotle and Themistius characterize this account as an attempt to combine the cognitive and the motivic ways of thinking about the soul; as Themistius puts it (12.30–33):