 It is worth noting that the author of the Prolegomena sets out the hierarchy of virtues as an order “according to depth” (kata bathos). The term bathos has a technical meaning in Iamblichus: it is borrowed from mathematics and is opposed to platos insofar as it describes the vertical order of items in a hierarchy, as opposed to the horizontal one (see Taormina in TP-2010: 245). This suggests that Iamblichus arranged his classification of virtues according to the vertical pattern described above, which points to his distinctive account of the hierarchy of beings.