 The difference between intellectual self-reflexivity and the reflexivity of the common sense is based on the spiritual nature of the intellectual soul. Unlike the common sense, the intellectual mind is spiritual and immaterial and therefore capable of being directly and immediately aware of itself. Certain authors (most notably Aquinas) had argued that this kind of direct awareness is not possible because considered in itself the intellect is fully potential. It must be actualized by thinking something else before it can be cognized. By contrast, Olivi argues that the soul is directly aware of itself.