Guide for the Perplexed, by Moses Maimonides, Friedländer tr. [1904], at sacred-texts.com
THE general object of the Law is twofold: the well-being of the soul, and the well-being of the body. The well-being of the soul is promoted by correct opinions communicated to the people according to their capacity. Some of these opinions are therefore imparted in a plain form, others allegorically: because certain opinions are in their plain form too strong for the capacity of the common people. The well-being of the body is established by a proper management of the relations in which we live one to another. This we can attain in two ways: first by removing all violence from our midst: that is to say, that we do not do every one as he pleases, desires, and is able to do; but every one of us does that which contributes towards the common welfare. Secondly, by teaching every one of us such good morals as must produce a good social state. Of these two objects, the one, the well-being of the soul, or the communication of correct opinions, comes undoubtedly first in rank, but the other, the well-being of the body, the government of the state, and the establishment of the best possible relations among men, is anterior in nature and time. The latter object is required first; it is also treated [in the Law] most carefully and most minutely, because the well-being of the soul can only be obtained after that of the body has been secured. For it has already been found that man has a double perfection: the first perfection is that of the body, and the second perfection is that of
the soul. The first consists in the most healthy condition of his material relations, and this is only possible when man has all his wants supplied, as they arise; if he has his food, and other things needful for his body, e.g., shelter, bath, and the like. But one man alone cannot procure all this; it is impossible for a single man to obtain this comfort; it is only possible in society, since man, as is well known, is by nature social.
The second perfection of man consists in his becoming an actually intelligent being; i.e., he knows about the things in existence all that a person perfectly developed is capable of knowing. This second perfection certainly does not include any action or good conduct, but only knowledge, which is arrived at by speculation, or established by research.
It is clear that the second and superior kind of perfection can only be attained when the first perfection has been acquired; for a person that is suffering from great hunger, thirst, heat, or cold, cannot grasp an idea even if communicated by others, much less can he arrive at it by his own reasoning. But when a person is in possession of the first perfection, then he may possibly acquire the second perfection, which is undoubtedly of a superior kind, and is alone the source of eternal life. The true Law, which as we said is one, and beside which there is no other Law, viz., the Law of our teacher Moses, has for its purpose to give us the twofold perfection. It aims first at the establishment of good mutual relations among men by removing injustice and creating the noblest feelings. In this way the people in every land are enabled to stay and continue in one condition, and every one can acquire his first perfection. Secondly, it seeks to train us in faith, and to impart correct and true opinions when the intellect is sufficiently developed. Scripture clearly mentions the twofold perfection, and tells us that its acquisition is the object of all the divine commandments. Comp. "And the Lord commanded us to do all these statutes, to fear the Lord our God, for our good always, that he might preserve us alive as it is this day" (Deut. vi. 24). Here the second perfection is first mentioned because it is of greater importance, being, as we have shown, the ultimate aim of man's existence. This perfection is expressed in the phrase, "for our good always." You know the interpretation of our Sages, "'that it may be well with thee' (ibid. xxii. 7), namely, in the world that is all good, 'and that thou mayest prolong thy days' (ibid.), i.e., in the world that is all eternal." In the same sense I explain the words, "for our good always," to mean that we may come into the world that is all good and eternal, where we may live permanently; and the words, "that he might preserve us alive as it is this day, "I explain as referring to our first and temporal existence, to that of our body, which cannot be in a perfect and good condition except by the co-operation of society, as has been shown by us.