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 receive the law from one and the other; but it is not in the same relation with one and the other. Inasmuch as it is a natural force it is equally free with regard to nature and with respect to reason; I mean to say it is not forced to pass either on the side of one or of the other: but as far as it is a moral faculty it is not free; I mean that it ought to choose the law of reason. It is not chained to one or the other, but it is obliged towards the law of reason. The will really then makes use of its liberty even whilst it acts contrary to reason: but it makes use of it unworthily, because, notwithstanding its liberty, it is no less under the jurisdiction of nature, and adds no real action to the operation of pure instinct; for to will by virtue of desire is only to desire in a different way.
There may be conflict between the law of nature, which works in us through the instinct, and the law of reason, which comes out of principles, when the instinct, to satisfy itself, demands of us an action which disgusts our moral sense. It is, then, the duty of the will to make the exigencies of the instinct give way to reason. Whilst the laws of nature oblige the will only conditionally, the laws of reason oblige absolutely and without conditions.
But nature obstinately maintains her rights, and as it is never by the result of free choice that she solicits us, she also does not withdraw any of her exigencies as long as she has not been satisfied. Since, from the first cause which gave the impulsion to the threshold of the will where its jurisdiction ends, all in her is rigorously necessary, consequently she can neither give way nor go back, but must always go forward and press more and more the will on which depends the satisfaction of her wants. Sometimes, it is true, we could say that nature shortens her road and acts immediately as a cause for the satisfaction of her needs without having in the first instance carried her request before the will. In such a case, that is to say, if man not simply allowed instinct to follow a free course, but if instinct took this course of itself, man would be no more than the brute. But it is very doubtful whether this case would ever present itself, and if ever it were really presented it would remain to be seen whether we should not blame the will itself for this blind power which the instinct would have usurped.
Thus the appetitive faculty claims with persistence the satisfaction of its wants, and the will is solicited to procure it; but the will should receive from the reason the motives by which she determines. What does the reason permit? What does she prescribe? This is what the will should decide upon. Well, then, if the will turns towards the reason before consenting to the request of the instinct, it is properly a moral act; but if it immediately decides, without consulting the reason, it is a physical act.
Every time, then, that nature manifests an exigence and seeks to draw the will along with it by the blind violence of affective movement, it is the duty of the will to order nature to halt until reason has pronounced. The sentence which reason pronounces, will it be favorable or the contrary to the interest of sensuousness? This is, up to the present time, what the will does not know. Also it should observe this conduct for all the affective movements without exception, and when it is nature which has spoken the first, never allow it to act as an immediate cause. Man would testify only by that to his independence. It is when, by an act of his will, he breaks the violence of his desires, which hasten towards the object which should satisfy them, and would dispense entirely with the co-operation of the will,—it is only then that he reveals himself in quality of a moral being, that is to say, as a free agent, which does not only allow itself to experience either aversion or desire, out which at all times must will his aversions and his desires.
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 and with all the harmony of his nature, but exclusive with his reasonable nature. Thus in these sorts of actions we could not find moral beauty, because an action is morally good only as far as inclination has taken part in it, and here the inclination protests against much more than it concurs with it. But these actions have moral grandeur, because all that testifies to a preponderating authority exercised over the sensuous nature has grandeur, and grandeur is found only there.