ry pass
into reality in us and in making out of us reality subject to the law of
necessity, is urged upon us as a duty by two opposing forces, which are
justly styled impulsions or instincts, because they impel us to realize
their object. The first of these impulsions, which I shall call the
sensuous instinct, issues from the physical existence of man, or from
sensuous nature; and it is this instinct which tends to enclose him in
the limits of time, and to make of him a material being; I do not say to
give him matter, for to do that a certain free activity of the
personality would be necessary, which, receiving matter, distinguishes it
from the Ego, or what is permanent. By matter I only understand in this
place the change or reality that fills time. Consequently the instinct
requires that there should be change, and that time should contain
something. This simply filled state of time is named sensation, and it
is only in this state that physical existence manifests itself.

As all that is in time is successive, it follows by that fact alone that
something is: all the remainder is excluded. When one note on an
instrument is touched, among all those that it virtually offers, this
note alone is real. When man is actually modified, the infinite
possibility of all his modifications is limited to this single mode of
existence. Thus, then, the exclusive action of sensuous impulsion has
for its necessary consequence the narrowest limitation. In this state
man is only a unity of magnitude, a complete moment in time; or, to speak
more correctly, he is not, for his personality is suppressed as long as
sensation holds sway over him and carries time along with it.

This instinct extends its domains over the entire sphere of the finite in
man, and as form is only revealed in matter, and the absolute by means of
its limits, the total manifestation of human nature is connected on a
close analysis with the sensuous instinct. But though it is only this
instinct that awakens and develops what exists virtually in man, it is
nevertheless this very instinct which renders his perfection impossible.
It binds down to the world of sense by indestructible ties the spirit
that tends higher, and it calls back to the limits of the present,
abstraction which had its free development in the sphere of the infinite.
No doubt, thought can escape it for a moment, and a firm will
victoriously resist its exigencies: but soon compressed nature resumes
her