Alexander's De anima must be distinguished from his lemmatic commentary on the Aristotelian treatise, which is only known to us through testimonies. 2 The De anima is described as "personal" 3 , has a polemical aim and targets a wider, less-specialized audience than commentaries typically do. Nonetheless, in many cases, Alexander's De anima conforms to the agenda and arrangement of its Aristotelian source.The examination of the nutritive soul is one such case: the discussion offers Alexander the opportunity to introduce methodological distinctions, as Aristotle himself did in De anima 2.4. But, whereas Aristotle, at the beginning of De anima 2.4, stresses that in order to determine the essence of a soul power, it is required to look into the activity of this power and, ultimately, into its object 4 , Alexander uses an analogy that does not appear in Aristotle's text:T.1. For we do not divide the soul as though it were composed from the parts into which we divide it as separate things. Rather, we divide the soul by enumerating the powers it has and by ascertaining the differences between them, just as if one were to divide an apple into its fragrance (εἴς τε εὐωδίαν), lustre, shape, and flavour. For dividing an apple in this way is not dividing it as a body (ὡς σώματος), even though the apple is certainly a body, nor as a number. (Alexander, transl. Caston slightly modified)