§56A learned physician of Holland named Johan van Beverwyck took the trouble to write De Termino Vitae and to collect sundry answers, [154] letters and discourses of some learned men of his time on this subject. This collection has been printed, and it is astonishing to see there how often people are misled, and how they have confused a problem which, properly speaking, is the easiest in the world. After that it is no wonder that there are very many doubts which the human race cannot abandon. The truth is that people love to lose themselves, and this is a kind of ramble of the mind, which is unwilling to subject itself to attention, to order, to rules. It seems as though we are so accustomed to games and jesting that we play the fool even in the most serious occupations, and when we least think to do so.

§57I fear that in the recent dispute between the theologians of the Augsburg Confession, De Termino Paenitentiae Peremptorio, which has called forth so many treatises in Germany, some misunderstanding, though of a different nature, has slipped in. The terms prescribed by the laws are amongst lawyers known as fatalia. It may be said, in a sense, that the peremptory term, prescribed to man for his repentance and amendment, is certain in the sight of God, with whom all is certain. God knows when a sinner will be so hardened that thereafter nothing can be done for him: not indeed that it would be impossible for him to do penance or that sufficient grace needs must be refused to him after a certain term, a grace that never fails; but because there will be a time whereafter he will no more approach the ways of salvation. But we never have certain marks for recognizing this term, and we are never justified in considering a man utterly abandoned: that would be to pass a rash judgement. It were better always to have room for hope; and this is an occasion, with a thousand others, where our ignorance is beneficial.

Prudens futuri temporis exitum Caliginosa nocte premit Deus.

§58The whole future is doubtless determined: but since we know not what it is, nor what is foreseen or resolved, we must do our duty, according to the reason that God has given us and according to the rules that he has prescribed for us; and thereafter we must have a quiet mind, and leave to God himself the care for the outcome. For he will never fail to do that which shall be the best, not only in general but also in particular, for those who have true confidence in him, that is, a confidence composed [155] of true piety, a lively faith and fervent charity, by virtue of which we will, as far as in us lies, neglect nothing appertaining to our duty and his service. It is true that we cannot 'render service' to him, for he has need of nothing: but it is 'serving him', in our parlance, when we strive to carry out his presumptive will, co-operating in the good as it is known to us, wherever we can contribute thereto. For we must always presume that God is prompted towards the good we know, until the event shows us that he had stronger reasons, although perhaps unknown to us, which have made him subordinate this good that we sought to some other greater good of his own designing, which he has not failed or will not fail to effect.

§59I have just shown how the action of the will depends upon its causes; that there is nothing so appropriate to human nature as this dependence of our actions; and that otherwise one would slip into a preposterous and unendurable fatality, namely into the Fatum Mahometanum, which is the worst of all because it overthrows foresight and good counsel. It is well to show, notwithstanding, how this dependence of voluntary actions does not fundamentally preclude the existence within us of a wonderful spontaneity, which in a certain sense makes the soul in its resolves independent of the physical influence of all other creatures. This spontaneity, hitherto little recognized, which exalts our command over our actions to the highest pitch, is a consequence of the System of Pre-established Harmony, of which I must give some explanation here. The Scholastic philosophers believed that there was a reciprocal physical influence between body and soul: but since it has been recognized that thought and dimensional mass have no mutual connexion, and that they are creatures differing toto genere, many moderns have acknowledged that there is no physical communication between soul and body, despite the metaphysical communication always subsisting, which causes soul and body to compose one and the same suppositum, or what is called a person. This physical communication, if there were such, would cause the soul to change the degree of speed and the directional line of some motions that are in the body, and vice versa the body to change the sequence of the thoughts that are in the soul. But this effect cannot be inferred from any notion conceived in the body and in the soul; though nothing be better known to us than the soul, since it is inmost to us, that is to say inmost to itself.

[156] 60. M. Descartes wished to compromise and to make a part of the body's action dependent upon the soul. He believed in the existence of a rule of Nature to the effect, according to him, that the same quantity of movement is conserved in bodies. He deemed it not possible that the influence of the soul should violate this law of bodies, but he believed that the soul notwithstanding might have power to change the direction of the movements that are made in the body; much as a rider, though giving no force to the horse he mounts, nevertheless controls it by guiding that force in any direction he pleases. But as that is done by means of the bridle, the bit, the spurs and other material aids, it is conceivable how that can be; there are, however, no instruments such as the soul may employ for this result, nothing indeed either in the soul or in the body, that is, either in thought or in the mass, which may serve to explain this change of the one by the other. In a word, that the soul should change the quantity of force and that it should change the line of direction, both these things are equally inexplicable.

§61Moreover, two important truths on this subject have been discovered since M. Descartes' day. The first is that the quantity of absolute force which is in fact conserved is different from the quantity of movement, as I have demonstrated elsewhere. The second discovery is that the same direction is still conserved in all bodies together that are assumed as interacting, in whatever way they come into collision. If this rule had been known to M. Descartes, he would have taken the direction of bodies to be as independent of the soul as their force; and I believe that that would have led direct to the Hypothesis of Pre-established Harmony, whither these same rules have led me. For apart from the fact that the physical influence of one of these substances on the other is inexplicable, I recognized that without a complete derangement of the laws of Nature the soul could not act physically upon the body. And I did not believe that one could here listen to philosophers, competent in other respects, who produce a God, as it were, ex machina, to bring about the final solution of the piece, maintaining that God exerts himself deliberately to move bodies as the soul pleases, and to give perceptions to the soul as the body requires. For this system, which is called that of occasional causes (because it teaches that God acts on the body at the instance of the soul, and vice versa), besides introducing perpetual miracles to establish communication [157] between these two substances, does not obviate the derangement of the natural laws obtaining in each of these same substances, which, in the general opinion, their mutual influence would cause.

§62Being on other considerations already convinced of the principle of Harmony in general, I was in consequence convinced likewise of the preformation and the Pre-established Harmony of all things amongst themselves, of that between nature and grace, between the decrees of God and our actions foreseen, between all parts of matter, and even between the future and the past, the whole in conformity with the sovereign wisdom of God, whose works are the most harmonious it is possible to conceive. Thus I could not fail to arrive at the system which declares that God created the soul in the beginning in such a fashion that it must produce and represent to itself successively that which takes place within the body, and the body also in such a fashion that it must do of itself that which the soul ordains. Consequently the laws that connect the thoughts of the soul in the order of final causes and in accordance with the evolution of perceptions must produce pictures that meet and harmonize with the impressions of bodies on our organs; and likewise the laws of movements in the body, which follow one another in the order of efficient causes, meet and so harmonize with the thoughts of the soul that the body is induced to act at the time when the soul wills it.