This view also is taken by those skilled in medicine, that according to the differences of complaints the visions of dreams appear differently to the patients: that the visions of those of weak stomach are of one kind, those of persons suffering from injury to the cerebral membrane of another, those of persons in fevers of yet another; that those of patients suffering from bilious and from phlegmatic affections are diverse, and those again of plethoric patients, and of patients in wasting disease, are different; whence we may see that the nutritive and vegetative faculty of the soul has in it by commixture some seed of the intelligent element, which is in some sense brought into likeness to the particular state of the body, being adapted in its fancies according to the complaint which has seized upon it.
Moreover, most men’s dreams are conformed to the state of their character: the brave man’s fancies are of one kind, the coward’s of another; the wanton man’s dreams of one kind, the continent man’s of another; the liberal man and the avaricious man are subject to different fancies; while these fancies are nowhere framed by the intellect, but by the less rational disposition of the soul, which forms even in dreams the semblances of those things to which each is accustomed by the practice of his waking hours.
XIV
That the mind is not in a part of the body; wherein also is a distinction of the movements of the body and of the soul.56
But we have wandered far from our subject, for the purpose of our argument was to show that the mind is not restricted to any part of the body, but is equally in touch with the whole, producing its motion according to the nature of the part which is under its influence. There are cases, however, in which the mind even follows the bodily impulses, and becomes, as it were, their servant; for often the bodily nature takes the lead by introducing either the sense of that which gives pain or the desire for that which gives pleasure, so that it may be said to furnish the first beginnings, by producing in us the desire for food, or, generally, the impulse towards some pleasant thing; while the mind, receiving such an impulse, furnishes the body by its own intelligence with the proper means towards the desired object. Such a condition, indeed, does not occur in all, save in those of a somewhat slavish disposition, who bring the reason into bondage to the impulses of their nature and pay servile homage to the pleasures of sense by allowing them the alliance of their mind; but in the case of more perfect men this does not happen; for the mind takes the lead, and chooses the expedient course by reason and not by passion, while their nature follows in the tracks of its leader.
But since our argument discovered in our vital faculty three different varieties—one which receives nourishment without perception, another which at once receives nourishment and is capable of perception, but is without the reasoning activity, and a third rational, perfect, and coextensive with the whole faculty—so that among these varieties the advantage belongs to the intellectual—let no one suppose on this account that in the compound nature of man there are three souls welded together, contemplated each in its own limits, so that one should think man’s nature to be a sort of conglomeration of several souls. The true and perfect soul is naturally one, the intellectual and immaterial, which mingles with our material nature by the agency of the senses; but all that is of material nature, being subject to mutation and alteration, will, if it should partake of the animating power, move by way of growth: if, on the contrary, it should fall away from the vital energy, it will reduce its motion to destruction.
Thus, neither is there perception without material substance, nor does the act of perception take place without the intellectual faculty.
XV
That the soul proper, in fact and name, is the rational soul, while the others are called so equivocally; wherein also is this statement, that the power of the mind extends throughout the whole body in fitting contact with every part.57
Now, if some things in creation possess the nutritive faculty, and others again are regulated by the perceptive faculty, while the former have no share of perception nor the latter of the intellectual nature, and if for this reason anyone is inclined to the opinion of a plurality of souls, such a man will be positing a variety of souls in a way not in accordance with their distinguishing definition. For everything which we conceive among existing things, if it be perfectly that which it is, is also properly called by the name it bears: but of that which is not every respect what it is called, the appellation also is vain. For instance:—if one were to show us true bread, we say that he properly applies the name to the subject: but if one were to show us instead that which had been made of stone to resemble the natural bread, which had the same shape, and equal size, and similarity of colour, so as in most points to be the same with its prototype, but which yet lacks the power of being food, on this account we say that the stone receives the
