The paper is devoted to analysis of the critique of Aristotelian theory of categories
from Enneads, its main arguments and the relation of Plotinus’ theory of the
kinds of sense world (kosmos aistheotos) to Aristotle’s categories. According to
Plotinus, Aristotelian notion of categories is not a relevant tool of grasping the being
in adequate sense, that is, as noetic being. The main argument is focused on the category of substance. There is a difference between how the problem of the kinds of
beings is understood in Enn. VI 1  and in Enn. VI 3 . In the latter a basis for
taking into account a modified form of Aristotelian categories as acceptable way of
predicating of changeable sensual objects can be pointed out.