ry that the satisfaction of so essential a
want, in which even the existence of the individual and of the species is
interested, should not be absolutely left to the discretion of man, and
his doubtful foresight. It has then provided for this interest, which in
the foundation concerns it, and it has also interfered with regard to the
form in placing in the determination of free arbitration a principle of
necessity. From that arises natural instinct, which is nothing else than
a principle of physical necessity which acts upon free arbitration by the
means of sensation.

The natural instinct solicits the sensuous faculty through the combined
force of pain and of pleasure: by pain when it asks satisfaction, and by
pleasure when it has found what it asks.

As there is no bargaining possible with physical necessity, man must
also, in spite of his liberty, feel what nature desires him to feel.
According as it awakens in him a painful or an agreeable sensation, there
will infallibly result in him either aversion or desire. Upon this point
man quite resembles the brute; and the stoic, whatever his power of soul,
is not less sensible of hunger, and has no less aversion to it, than the
worm that crawls at his feet.

But here begins the great difference: with the lower creature action
succeeds to desire or aversion quite as of necessity, as the desire to
the sensation, and the expression to the external impression. It is here
a perpetual circle, a chain, the links of which necessarily join one to
the other. With man there is one more force--the will, which, as a
super-sensuous faculty, is not so subject to the law of nature, nor that
of reason, that he remains without freedom to choose, and to guide
himself according to this or to that. The animal cannot do otherwise
than seek to free itself from pain; man can decide to suffer.

The will of man is a privilege, a sublime idea, even when we do not
consider the moral use that he can make of it. But firstly, the animal
nature must be in abeyance before approaching the other, and from that
cause it is always a considerable step towards reaching the moral
emancipation of the will to have conquered in us the necessity of nature,
even in indifferent things, by the exercise in us of the simple will.

The jurisdiction of nature extends as far as the will, but there it
stops, and the empire of reason commences. Placed between these two
jurisdictions, the will is absolutely free to receiv