What prevented Him from making His primary object a direct commandment to us, and to give us the capacity of obeying it? ...As it is the chief object and purpose of God that we should believe in the Law, and act according to that which is written therein, why has He not given us the capacity of continually believing in it, and following its guidance, instead of holding out to us reward for obedience, and punishment for disobedience, or of actually giving all the predicted reward and punishment? For [the promises and the threats] are but the means of leading to this chief object. What prevented Him from giving us, as part of our nature, the will to do that which He desires us to do, and to abandon the kind of worship which He rejects? There is one general answer to these three questions, and all questions of the character; it is this: Although in every one of the signs [related in Scripture] the natural property of some individual being is changed, the nature of man is never changed by God by way of miracle. ...it is in His power, according to the principles taught in Scripture, but it has never been His will to do it, and it never will be. If it were part of His will to change [at His desire] the nature of any person, the mission of prophets and the giving of the Law would have been altogether superfluous.

The custom which was in those days general among all men, and the general mode of worship in which the Israelites were brought up, consisted in sacrificing animals in those temples which contained certain images to bow down to those images, and to burn incense before them; religious and ascetic persons were in those days the persons that were devoted to the service in the temples erected to the stars... It was in accordance with the wisdom and plan of God, as displayed in the whole Creation, that He did not command us to give up and to discontinue all these manners of service, for to obey such a commandment it would have been contrary to the nature of man, who generally cleaves to that to which he is used... By this Divine plan it was effected that the traces of idolatry were blotted out, and the truly great principle of our faith, the existence and Unity of God, was firmly established; this result was thus obtained without deterring or confusing the minds of the people by the abolition of the service to which they were accustomed and which alone was familiar to them.

The most evident of the wonders described in the book On the Use of the Limbs [by Galen]... is clearly perceived by all who examine them with a sharp eye. In a similar manner did God provide for each individual animal of the class of mammalia. When such an animal is born it is extremely tender, and cannot be fed with dry food. Therefore breasts were provided which yield milk, and the young can be fed with moist food which corresponds to the condition of the limbs of the animal, until the latter have gradually become dry and hard. Many precepts in our Law are the result of a similar course adopted by the same Supreme Being. It is, namely, impossible to go suddenly from one extreme to the other; it is therefore according to the nature of man impossible for him suddenly to discontinue everything to which he has been accustomed.

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.

According to the theory of those weak minded persons, man is more perfect than his Creator. For what man says or does has a certain object, whilst the actions of God are different; He commands us to do what is of no use to us, and forbids us to do what is harmless. Far be this! On the contrary, the sole object of the Law is to benefit us.

It is frequently expressed in all parts of Scripture, that the worship of the stars would be followed by absence of rain, devastation of the land, bad times, diseases, and shortness of life. But abandonment of that worship, and the return to the service of God, would be the cause of the presence of rain, fertility of the ground, good times, health and length of life. Thus Scripture teaches, in order that man should abandon idolatry, the reverse of that which idolatrous priests preached to the people, for, as has been shown by us, the principal object of the Law is to remove this doctrine, and to destroy its traces.

How great is the usefulness of every precept that delivers us from this great error, and leads us back to the true faith: that God, the Creator of all things, rules the Universe; that He must be served, loved, and feared, and not those imaginary deities. According to this faith we approach the true God, and obtain His favour without having recourse to burdensome means; for nothing else is required but to love and fear Him; this is the aim in serving God, as will be shown. Comp. "And now, Israel, what doth the Lord thy God require of thee but to fear the Lord?" &c. (Deut. x. 12)

You know from the repeated declarations in the Law that the principal purpose of the whole Law was the removal and utter destruction of idolatry, and all that is connected therewith, even its name, and everything that might lead to any such practices, e.g., acting as a consulter with familiar spirits, or as a wizard, passing children through the fire, divining, observing the clouds, enchanting, charming, or inquiring of the dead. The law prohibits us to imitate the heathen in any of these deeds, and a fortiori to adopt them entirely. It is distinctly said in the Law that everything which idolaters consider as service to their gods, and a means of approaching them, is rejected and despised by God... Thus all precepts cautioning against idolatry, or against that which is connected therewith, leads to it, or is related to it, are evidently useful.

In accordance with the Sabean theories images were erected to the stars, golden images to the sun, images of silver to the moon, and they attributed the metals and the climates to the influence of the planets, saying that a certain planet is the god of a certain zone. They built temples, placed in them images, and assumed that the stars sent forth their influence upon these images, which are thereby enabled (to speak) to understand, to comprehend, to inspire human beings, and to tell them what is useful to them. They apply the same to trees which fall to the lot of these stars.

When Abraham the "Pillar of the World" appeared, he became convinced that there is a spiritual Divine Being, which is not a body, nor a force residing in a body, but is the author of the spheres and the stars; and he saw the absurdity of the tales in which he had been brought up. He therefore began to attack the belief of the Sabeans, to expose the falsehood of their opinions, and to proclaim publicly in opposition to them, "the name of the Lord, the God of the Universe" (Gen. xxi. 33), which proclamation included at the same time the Existence of God, and the Creation of the Universe by God.