If light encounters an object, it depends on the properties and consistence of the latter how the light reacts, i.e. whether it is reflected or just passes through the object. In philosophical contexts, the properties of light are often used to describe processes of insight. It is therefore not surprising that the connection between body and soul, which interlinks with concepts of perception and knowledge, is often described using images and metaphors taken from the realm of light – in Antiquity as well as in modern times. The properties of light as they were addressed in the installations were supposed to engender further thoughts about thevehicle of the soul that is located somewhere between immateriality and materiality. Both, the preparatory research into Ancient theories of light and ochema as well as the installations themselves can be understood as artistic research.