The Theory of Intellectual Construction in Theodoric of Freiberg

In his Treatise on Categorially Determined Reality, Theodoric of Freiberg addresses the issue of the theoretical status of the categories, rejecting the merely passive-apprehensive function of the theoretical intellect in favor of its constitutive activity in the knowledge of natural things. Thereby, he takes a decisive step beyond Averroes. Proceeding on the basis of the Aristotelian theory of causation, emphasizing in particular that all natural movement and change presuppose an effective cause, Theodoric maintains - in distinction from Albert the Great - that every object receives its peculiar determination, or quiddity, through the actualized possible intellect, for which differentiation and effectuation are one. Nonetheless, Theodoric qualifies the radicality of this position by setting up alongside the causality of the intellect that of the first cause and that of nature, thus allowing for the independence of theology and natural science.