Fifth Theory.—This is our theory, or that of our Law. ...The theory of man's perfectly free will is one of the fundamental principles of the Law of our teacher Moses, and of those who follow the Law. According to this principle man does what is in his power to do, by his nature, his choice, and his will; and his action is not due to any faculty created for the purpose. All species of irrational animals likewise move by their own free will. This is the Will of God; that is to say, it is due to the eternal divine will that all living beings should move freely, and that man should have the power to act according to his will or choice within the limits of his capacity.
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Ch.17Maimonides
Third Theory.—According to this theory, there is nothing in the whole Universe... that is due to chance; everything is the result of will, intention, and rule. It is a matter of course that he who rules must know. The Mohametan Ashariyah adhere to this theory, notwithstanding evident absurdities implied in it. ...The Ashariyah were therefore compelled to assume that motion and rest of living beings are predestined, and that it is not in the power of a man to do a certain thing or to leave it undone. ...It follows also from this theory, that precepts are perfectly useless, since the people to whom any law is given... can neither do what they are commanded nor abstain from what they are forbidden. ...According to this theory, it must also be assumed that the actions of God have no final cause. All these absurdities are admitted by the Ashariyah for the purpose of saving this theory.
Maimonides
Consider what kind of authority [can be ascribed to] any principle which it open to us to choose to regard as authoritative or not. I may choose for example to observe a regimen of asceticism and fasting ... for reasons of health ... What authority such principles possess derives from the reasons for my choice. Insofar as they are good reasons, the principles have corresponding authority; insofar as they are not, the principles are to that same extent deprived of authority. It would follow that a principle for the choice of which no reasons could be given would be a principle devoid of authority. I might indeed adopt such a principle from whim or caprice or from some arbitrary purpose ... but if I then chose to abandon the principle whenever it suited me, I would be entirely free to do so.
Alasdair MacIntyre
Men follow their sentiments and their self-interest, but it pleases them to imagine that they follow reason. And so they look for, and always find, some theory which, a posteriori, makes their actions appear to be logical. If that theory could be demolished scientifically, the only result would be that another theory would be substituted for the first one, and for the same purpose.
Vilfredo Pareto
Fourth Theory.—Man has free will; it is therefore intelligible that the Law contains commands and prohibitions, with announcements of reward and punishment. All acts of God are due to wisdom; no injustice is found in him, and he does not afflict the good. The Mu'tazila profess this theory, although they do not believe in man's absolute free will. They hold that God takes notice of the falling of the leaf and the destruction of the ant, and that his Providence extends over all beings.
Maimonides
Any physical theory is always provisional, in the sense that it is only a hypothesis: you can never prove it. No matter how many times the results of experiments agree with some theory, you can never be sure that the next time the result will not contradict the theory. On the other hand, you can disprove a theory by finding even a single observation that disagrees with the predictions of the theory. As philosopher of science Karl Popper has emphasized, a good theory is characterized by the fact that it makes a number of predictions that could in principle be disproved or falsified by observation. Each time new experiments are observed to agree with the predictions the theory survives, and our confidence in it is increased; but if ever a new observation is found to disagree, we have to abandon or modify the theory.
Stephen Hawking
Maimonides
Mair, Eddie
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