him: it is probably to be met with even in persons of the commonest
understanding, who, as is well known, are very much inclined to
suppose behind the objects of the senses something else invisible
and acting of itself. They spoil it, however, by presently
sensualizing this invisible again; that is to say, wanting to make
it an object of intuition, so that they do not become a whit the
wiser.

Now man really finds in himself a faculty by which he
distinguishes himself from everything else, even from himself as
affected by objects, and that is reason. This being pure spontaneity
is even elevated above the understanding. For although the latter is a
spontaneity and does not, like sense, merely contain intuitions that
arise when we are affected by things (and are therefore passive),
yet it cannot produce from its activity any other conceptions than
those which merely serve to bring the intuitions of sense under
rules and, thereby, to unite them in one consciousness, and without
this use of the sensibility it could not think at all; whereas, on the
contrary, reason shows so pure a spontaneity in the case of what I
call ideas [ideal conceptions] that it thereby far transcends
everything that the sensibility can give it, and exhibits its most
important function in distinguishing the world of sense from that of
understanding, and thereby prescribing the limits of the understanding
itself.

For this reason a rational being must regard himself qua
intelligence (not from the side of his lower faculties) as belonging
not to the world of sense, but to that of understanding; hence he
has two points of view from which he can regard himself, and recognise
laws of the exercise of his faculties, and consequently of all his