344. But M. Bayle further opposes this on another principle, one which I have already mentioned. It seems that he thinks the ideas which the soul conceives in relation to the feelings of the body are arbitrary. Thus God might have caused the dissolution of continuity to give us pleasure. He even maintains that the laws of motion are entirely arbitrary. 'I would wish to know', he says (vol. III, ch. 166, p. 1080), 'whether God established by an act of his freedom of indifference general laws on the communication of movements, and the particular laws on the union of the human soul with an organic body? In this case, he could have established quite different laws, and adopted a system whose results involved neither moral evil nor physical evil. But if the answer is given that God was constrained by supreme wisdom to establish the laws that he has established, there we have neither more nor less than the _Fatum_ of [332] the Stoics. Wisdom will have marked out a way for God, the abandonment whereof will have been as impossible to him as his own self-destruction.' This objection has been sufficiently overthrown: it is only a moral necessity; and it is always a happy necessity to be bound to act in accordance with the rules of perfect wisdom. 345. Moreover, it appears to me that the reason for the belief held by many that the laws of motion are arbitrary comes from the fact that few people have properly examined them. It is known now that M. Descartes was much mistaken in his statement of them. I have proved conclusively that conservation of the same quantity of motion cannot occur, but I consider that the same quantity of force is conserved, whether absolute or directive and respective, whether total or partial. My principles, which carry this subject as far as it can go, have not yet been published in full; but I have communicated them to friends competent to judge of them, who have approved them, and have converted some other persons of acknowledged erudition and ability. I discovered at the same time that the laws of motion actually existing in Nature, and confirmed by experiments, are not in reality absolutely demonstrable, as a geometrical proposition would be; but neither is it necessary that they be so. They do not spring entirely from the principle of necessity, but rather from the principle of perfection and order; they are an effect of the choice and the wisdom of God. I can demonstrate these laws in divers ways, but must always assume something that is not of an absolutely geometrical necessity. Thus these admirable laws are wonderful evidence of an intelligent and free being, as opposed to the system of absolute and brute necessity, advocated by Strato or Spinoza.