A History of Mediaeval Jewish Philosophy

by Isaac Husik

Sleep is the rest of the senses, as death is their entire cessation. The purpose of sleep is to give the brain rest so that the "spirit" of the soul should not be dissolved and the "mixture" of the body injured suddenly and cause death. The heart rests continually between contraction and expansion, hence it needs no special rest at night. Waking is the activity of the senses and the exercise of their functions to satisfy the desires of the body. The motions of the soul in the waking state are in the interest of the needs of the body. During sleep the soul looks out for itself, for its better world, being then free from the business of the body. If it is pure and bright, and the body is free from the remnant of food, and the thought is not depressed by sorrow and grief—then the soul is aroused in its desire for the future, and beholds wonderful things.[172]

No one can deny that man has a rational soul because speech is an attribute which man has above all other animals. The soul is not a corporeal thing, for if it were it would have to occupy place like body, and would have color and form and other qualities like body. Moreover, it would require something else to give it life like body. In other words, the soul would require another soul, and that soul another soul, and so on ad infinitum, which is impossible. Hence the soul is not a corporeal thing.

Nor can we say that the soul is in the body. For if it were, it would itself be body; since only body can fill the empty place in another body, as water fills a jar.

The soul is a substance and not an accident. An accident is a quality which makes its appearance in something else, and has no permanence. If then the rational soul is an accident of the body, it has no permanence, and man is sometimes rational and sometimes not. This is absurd, for in that case there could be no purpose in giving him commandments and statutes.

There are inseparable accidents to be sure, like the color of the Ethiopian's skin. But in that case we know the color is an accident despite its inseparability, from the fact that in other things color is an accident and may be removed. This will not apply to the reason. For we do not find anything in which reason is a removable accident. The moment you remove reason, you remove man, for reason is essential to man. The fact that as a result of an injury a man may lose his reason is no argument against us, for this happens only when an injury is inflicted on the brain, which is the reason's instrument. This accounts for the fact, too, that men in good health if given henbane to drink lose their reason, because the drink affects the brain. On the other hand, we see that those afflicted with a certain disease of the intestines, which causes their death, are more rational and brighter at the time of death than ever before, showing that the soul cannot be an accident depending upon the "mixture" of the body.

To regard the soul as an accident, while the body is a substance, would make the soul inferior to the body. This is absurd. For we have the body in common with the beasts; whereas it is in virtue of the reason that we are given commandments, and reward and punishment in the world to come.

If the soul is neither a corporeal thing nor an accident of body, it must be a spiritual substance. And the best definition of the soul is that of Aristotle, who says it is a substance giving perfection to a natural organic body, which has life potentially. Every phrase in this definition tells. "Substance" excludes the view that the soul is an accident. "Giving perfection" signifies that the soul is that which makes man perfect, bringing him to the next world, and being the purpose not merely of his creation and the composition of his body, but of the creation of matter as well. "Natural organic body" indicates that the body is an organon, or instrument in the function of the soul, the latter using the body to carry out its own purposes. The rational soul is like a king; the animal soul is like an official before the king, rebuking the appetitive soul.

In the discussion of the last paragraph we have a good example of the uncritical attitude of Ibn Zaddik toward the various schools of philosophical thought, particularly those represented by Plato and Aristotle. This attitude is typical of the middle ages, which appealed to authority in philosophy as well as in theology, and hence developed a harmonistic attitude in the presence of conflicting authorities. Aided by their defective knowledge of the complete systems of the ancient Greek philosophers, by the difficulties and obscurities incident to translations from an alien tongue, and by the spurious writings circulating in the name of an ancient Greek philosopher, the precise demarcation of schools and tendencies became more and more confused, and it was possible to prove that Plato and Aristotle were in entire agreement. Thus Ibn Zaddik has no scruple in combining (unconsciously, to be sure) Platonic and Neo-Platonic psychology with the Aristotelian definition representing quite a different point of view. The one is anthropological dualism, regarding the soul as a distinct entity which comes to the body from without. The other is a biological monism, in which the soul is the reality of the body, the essence of its functioning, which makes the potentially living body an actually living body. We cannot enter here into a criticism of the elements of the Aristotelian definition of the soul as rendered and interpreted by Ibn Zaddik, but will merely say that it misses completely the meaning of Aristotle, and shows that Ibn Zaddik did not take it from the "De Anima" of Aristotle, but found it without its context in some Arabic work.

To return from our digression, the three souls, Ibn Zaddik tells us, are spiritual powers; every one of them is a substance by itself of benefit to the body. The rational soul gets the name soul primarily, and the others get it from the rational soul. The Intellect is called soul because the rational soul and the Intellect have a common matter. And hence when the soul is perfected it becomes intellect. This is why the rational soul is called potential intellect. The only difference between them is one of degree and excellence. The world of Intellect is superior, and its matter is the pure light, Intellect in which there is no ignorance, because it comes from God without any intermediate agency.

Here we see just a touch of the Neo-Platonic doctrine of emanation, of which the Universal Intellect is the first. But it is considerably toned down and not continued down the series as in Plotinus or the Brethren of Purity.