res.

But this act of taking previously the advice of reason is already an
attempt against nature, who is a competent judge in her own cause, and
who will not allow her sentences to be submitted to a new and strange
jurisdiction; this act of the will which thus brings the appetitive
faculty before the tribunal of reason is then, in the proper acceptation
of the word, an act against nature, in that it renders accidental that
which is necessary, in that it attributes to the laws of reason the right
to decide in a cause where the laws of nature can alone pronounce, and
where they have pronounced effectively. Just, in fact, as the reason in
the exercise of its moral jurisdiction is little troubled to know if the
decisions it can come to will satisfy or not the sensuous nature, so the
sensuous in the exercise of the right which is proper to it does not
trouble itself whether its decisions would satisfy pure reason or not.
Each is equally necessary, though different in necessity, and this
character of necessity would be destroyed if it were permitted for one to
modify arbitrarily the decisions of the other. This is why the man who
has the most moral energy cannot, whatever resistance he opposes to
instinct, free himself from sensuousness, or stifle desire, but can only
deny it an influence upon the decisions of his will; he can disarm
instinct by moral means, but he cannot appease it but by natural means.
By his independent force he may prevent the laws of nature from
exercising any constraint over his will, but he can absolutely change
nothing of the laws themselves.

Thus in the affective movements in which nature (instinct) acts the first
and seeks to do without the will, or to draw it violently to its side,
the morality of character cannot manifest itself but by its resistance,
and there is but one means of preventing the instinct from restraining
the liberty of the will: it is to restrain the instinct itself. Thus we
can only have agreement between the law of reason and the affective
phenomena, under the condition of putting both in discord with the
exigencies of instinct. And as nature never gives way to moral reasons,
and recalls her claims, and as on her side, consequently, all remains in
the same state, in whatever manner the will acts towards her, it results
that there is no possible accord between the inclination and duty,
between reason and sense; and that here man cannot act at the same time
with all his being a