Reason does not indeed necessarily exclude the finite, either in time or in space, but it includes them 'eminenter'.

Thus the prime mover of the material universe is affirmed to contain all motion as its cause, but not to be, or to suffer, motion in itself.
Reason is not the faculty of the finite.

But here I must premise the following.

The faculty of the finite is that which reduces the confused impressions of sense to their essential forms,--quantity, quality, relation, and in these action and reaction, cause and effect, and the like; thus raises the materials furnished by the senses and sensations into objects of reflection, and so makes experience possible.

Without it, man's representative powers would be a delirium, a chaos, a scudding cloudage of shapes; and it is therefore most appropriately called the understanding, or substantiative faculty.