On the third class of objects for the subject and the form of the principle of sufficient reason governing it

As pure perceptions, these objects for the faculty of representation are absolute. That is, they are distinct from complete representations and from the characteristic of having or not having content, which comes only with complete representations. For not even pure points and lines can be represented visuaUy: they can only be perceived a priori, just as the infinite extent and divisibility of space and time can only be objects of pure, not empirical, perception.