Full Idea
Our concept of an incorporeal nature is merely negative.
Clarification
'Incorporeal' means non-physical
Gist of Idea
Our concept of an incorporeal nature is merely negative
Source
Immanuel Kant (Critique of Pure Reason [1781], B827/A799)
Book Reference
Kant,Immanuel: 'Critique of Pure Reason', ed/tr. Guyer,P /Wood,A W [CUO 1998], p.674
A Reaction
This nicely pinpoints a well-known problem with the dualist theory of mind.