Full Idea
The categories of modality have this peculiarity: as a determination of the object they do not augment the concept to which they are ascribed in the least, but rather express only the relation to the faculty of cognition.
Gist of Idea
Modalities do not augment our concepts; they express their relation to cognition
Source
Immanuel Kant (Critique of Pure Reason [1781], B266/A219)
Book Reference
Kant,Immanuel: 'Critique of Pure Reason', ed/tr. Guyer,P /Wood,A W [CUO 1998], p.322
A Reaction
A nice summary of Kant's view of modality. It does not arise out of reality, or even out of the nature of our concepts, but out of the relations which our concepts enter into, in the processes of understanding. (Do I understand that?)