These remarks indicate that for Grosseteste some sort of spiritual light and vision is involved in scientific knowledge, but they also strongly suggest that Grosseteste is wedded to an Aristotelian account in which the human mind abstracts intelligible items from the data of sense. These intelligible items would appear to be the genera and species of created things, viewed as immanent Aristotelian universals, the second lowest level of a hierarchy of universals Grosseteste sets out in the commentary, the highest being the reasons of things in the divine mind. But what exactly is the nature of the vision and illumination involved in scientific knowledge? In particular, in his account of demonstrative science, and thus of the sort of knowledge possible for most of us in this life, is Grosseteste employing a notion of divine illumination, as he clearly does in his treatise On Truth?