Maimonides

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.

Thus they shall not miss this particular branch of the many branches of the Law and will have no need to roam and ramble about in other books in search of information on matters set forth in this treatise.

The key to the understanding and to the full comprehension of all that the Prophets have said is found in the knowledge of the figures, their general ideas, and the meaning of each word they contain.

Know that the figures employed by prophets are of two kinds: first, where every word which occurs in the simile represents a certain idea: and secondly, where the simile, as a whole, represents a general idea, but has a great many points which have no reference whatever to that idea: they are simply required to give to the simile its proper form and order, or better to conceal the idea: the simile is therefore continued as far as necessary, according to its literal sense. Consider this well.

For that which is without a beginning, a final cause need not be sought.

It is namely distinctly stated in Scripture and handed down by tradition that the first commandments communicated to us did not include any law at all about burnt offering and sacrifice.

Whatever form it has, it [matter] will be disposed to receive another form; it never leaves off moving and casting off the form which it has in order to receive another. ...It is therefore clear that all corruption, destruction, or defect comes from matter.

The prophet [ Isaiah]... points out what will be the cause of this change; for he says that hatred, quarrel, and fighting will come to an end, because men will have a true knowledge of God. "They shall not hurt nor destroy in all my holy mountain: for the earth shall be full of the knowledge of the Lord, as the waters which cover the sea" (Isa. xi. ver. 9) Note it.

Every one of the six hundred and thirteen precepts serves to inculcate some truth, to remove some erroneous opinion, to establish proper relations in society, to diminish evil, to train in good manners, or to warn against bad habits. All this depends on three things: opinions, morals, and social conduct. ...these three principles suffice for assigning a reason for every one of the Divine commandments.

When I have a difficult subject before me — when I find the road narrow, and can see no other way of teaching a well established truth except by pleasing one intelligent man and displeasing ten thousand fools — I prefer to address myself to the one man, and to take no notice whatever of the condemnation of the multitude; I prefer to extricate that intelligent man from his embarrassment and show him the cause of his perplexity, so that he may attain perfection and be at peace.

It is of great advantage that man should know his station, and not imagine that the whole universe exists only for him. We hold that the universe exists because the Creator wills it so; that mankind is low in rank as compared with the uppermost portion of the universe, viz., with the spheres and the stars; but, as regards the angels, there cannot be any real comparison between man and angels, although man is the highest of all beings on earth; i.e., of all the beings formed of the four elements.

The portion of the materia prima which is... is endowed with the intellectual faculty, possesses a special property by which each individual, according to the degree of his perfection, is enabled to manage, to calculate, and to discover what is conducive both to the temporary existence of the individual and to the preservation of the species. All other movements... by the individual members of the species are due to accident; they are not, according to Aristotle, the result of rule and management... Aristotle sees no difference between the falling of a leaf or a stone and the death of the good and noble people in the ship; nor does he distinguish between the destruction of a multitude of ants by an ox depositing on them his excrement and the death of worshippers killed by the fall of the house when its foundations give way.

The first kind of evil is that which is caused to man by the circumstance that he is subject to genesis and destruction, or that he possesses a body.

We must consider the words, "the heavens were opened" (Ezek. i. 1); they give the key to the understanding of the whole. The figure of opening, also that of opening the gates, occurs frequently in the books of the prophets... When he commences to describe the firmament in detail, he says, "the firmament," without adding the words "the likeness of," for he says, "And I looked, and behold, in the firmament that was above the head of the cherubims there appeared over them as it were a sapphire stone, as the appearance of the likeness of a throne" (Ezek x. 1). Here the prophet speaks of "the firmament" and not of "the likeness of the firmament,"...

This gift... which God gave us in order to enable us to perfect ourselves, to learn and to teach, must not be employed in doing that which is for us most degrading and perfectly disgraceful... Those who employ the faculty of thinking and speaking in the service of that sense which is no honour to us, who think more than necessary of drink and love, or even sing of these things; they employ and use the divine gift in acts of rebellion against the Giver, and in transgression of his commandments.

It is man's duty to love and to fear God, even without hope of reward or fear of punishment.

The question, "What is the purpose thereof?" cannot be asked about anything which is not the product of an agent; therefore we cannot ask what is the purpose of the existence of God.

The soul, when accustomed to superfluous things, acquires a strong habit of desiring things which are neither necessary for the preservation of the individual nor for that of the species. This desire is without limit, whilst those which are necessary are few in number and restricted within certain limits; but what is superfluous is without end...

Those who desire to be men in truth, and not brutes, having only the appearance and shape of men, must constantly endeavor to reduce the wants of the body, such as eating, love, drinking, anger, and all manners originating in lust and passion; they must feel ashamed of them and set limits to them for themselves.

Everything in the varying human affairs is due to chance, according to Aristotle, to the Divine Will alone according to the Ashariyah, to Divine Wisdom according to the Mu'tazilites, to the merits of man according to our opinion. It is therefore possible, according to the Ashariyah, that God inflicts pain on a good and pious man in this world, and eeps him forever in fire, which is assumed to rage in the world to come; they simply say it is the will of God. The Mu'tazilites would consider this an injustice, and therefore assume that every being, even an ant, that is stricken with pain, has compensation for it... and it is due to God's Wisdom, that a being is struck and afflicted in order to receive compensation. We, however, believe that all these human affairs are managed with justice; far be it from God to do wrong, to punish any one unless the punishment is necessary and merited. It is distinctly stated in the Law, that all is done in accordance with justice; and the words of our Sages generally express the same idea.