You can see in this that Calvin has spent a fair amount of time not in his books but dealing with people. There are models of our psyche which are best to avoid. In this, you see what Freud called the Id and the Ego expressed by the ancient philosophers. Calvin said that these ideas did not have utility and he was correct.
The Manichean error is one where you take a text out of context and project a meaning on it that probably was not there in the first place. There are far too many functional Manichees teaching.
5. But before I proceed further, it is necessary to advert to the dream of the Manichees, which Servetus has attempted in our day to revive. Because it is said that God breathed into man's nostrils the breath of life (Gen. 2:7), they thought that the soul was a transmission of the substance of God; as if some portion of the boundless divinity had passed into man. It cannot take long time to show how many gross and foul absurdities this devilish error carries in its train. For if the soul of man is a portion transmitted from the essence of God, the divine nature must not only be liable to passion and change, but also to ignorance, evil desires, infirmity, and all kinds of vice. There is nothing more inconstant than man, contrary movements agitating and distracting his soul. He is ever and anon deluded by want of skill, and overcome by the slightest temptations; while every one feels that the soul itself is a receptacle for all kinds of pollution. All these things must be attributed to the divine nature, if we hold that the soul is of the essence of God, or a secret influx of divinity. Who does not shudder at a thing so monstrous? Paul, indeed, quoting from Aratus, tells us we are his offspring (Acts 17:28); not in substance, however, but in quality, in as much as he has adorned us with divine endowments. Meanwhile, to lacerate the essence of the Creator, in order to assign a portion to each individual, is the height of madness. It must, therefore, be held as certain, that souls, notwithstanding of their having the divine image engraven on them, are created just as angels are. Creation, however, is not a transfusion of essence, but a commencement of it out of nothing. Nor, though the spirit is given by God, and when it quits the flesh again returns to him, does it follow that it is a portion withdrawn from his essence. Here, too, Osiander, carried away by his illusions entangled himself in an impious error, by denying that the image of God could be in man without his essential righteousness; as if God were unable, by the mighty power of his Spirit, to render us conformable to himself, unless Christ were substantially transfused into us. Under whatever colour some attempt to gloss these delusions, they can never so blind the eyes of intelligent readers as to prevent them from discerning in them a revival of Manicheism. But from the words of Paul, when treating of the renewal of the image (2 Cor. 3:18), the inference is obvious, that man was conformable to God, not by an influx of substance, but by the grace and virtue of the Spirit. He says, that by beholding the glory of Christ, we are transformed into the same image as by the Spirit of the Lord; and certainly the Spirit does not work in us so as to make us of the same substance with God.
6. It were vain to seek a definition of the soul from philosophers, not one of whom, with the exception of Plato, distinctly maintained its immortality. Others of the school of Socrates, indeed, lean the same way, but still without teaching distinctly a doctrine of which they were not fully persuaded. Plato, however, advanced still further, and regarded the soul as an image of God. Others so attach its powers and faculties to the present life, that they leave nothing external to the body. Moreover, having already shown from Scripture that the substance of the soul is incorporeal, we must now add, that though it is not properly enclosed by space, it however occupies the body as a kind of habitation, not only animating all its parts, and rendering the organs fit and useful for their actions, but also holding the first place in regulating the conduct. This it does not merely in regard to the offices of a terrestrial life, but also in regard to the service of God. This, though not clearly seen in our corrupt state, yet the impress of its remains is seen in our very vices. For whence have men such a thirst for glory but from a sense of shame? And whence this sense of shame but from a respect for what is honourable? Of this, the first principle and source is a consciousness that they were born to cultivate righteousness,--a consciousness akin to religion. But as man was undoubtedly created to meditate on the heavenly life, so it is certain that the knowledge of it was engraven on the soul. And, indeed, man would want the principal use of his understanding if he were unable to discern his felicity, the perfection of which consists in being united to God. Hence, the principal action of the soul is to aspire thither, and, accordingly, the more a man studies to approach to God, the more he proves himself to be endued with reason.
Though there is some plausibility in the opinion of those who maintain that man has more than one soul, namely, a sentient and a rational, yet as there is no soundness in their arguments, we must reject it, unless we would torment ourselves with things frivolous and useless. They tell us (see chap. 5 sec. 4), there is a great repugnance between organic movements and the rational part of the soul. As if reason also were not at variance with herself, and her counsels sometimes conflicting with each other like hostile armies. But since this disorder results from the depravation of nature, it is erroneous to infer that there are two souls, because the faculties do not accord so harmoniously as they ought. But I leave it to philosophers to discourse more subtilely of these faculties. For the edification of the pious, a simple definition will be sufficient. I admit, indeed, that what they ingeniously teach on the subject is true, and not only pleasant, but also useful to be known; nor do I forbid any who are inclined to prosecute the study. First, I admit that there are five senses, which Plato (in TheÊteto) prefers calling organs, by which all objects are brought into a common sensorium, as into a kind of receptacle: Next comes the imagination (phantasia), which distinguishes between the objects brought into the sensorium: Next, reason, to which the general power of Judgment belongs: And, lastly, intellect, which contemplates with fixed and quiet look whatever reason discursively revolves. In like manner, to intellect, fancy, and reason, the three cognitive faculties of the soul, correspond three appetite faculties--viz. will--whose office is to choose whatever reason and intellect propound; irascibility, which seizes on what is set before it by reason and fancy; and concupiscence, which lays hold of the objects presented by sense and fancy.
Though these things are true, or at least plausible, still, as I fear they are more fitted to entangle, by their obscurity, than to assist us, I think it best to omit them. If any one chooses to distribute the powers of the mind in a different manner, calling one appetive, which, though devoid of reason, yet obeys reason, if directed from a different quarter, and another intellectual, as being by itself participant of reason, I have no great objection. Nor am I disposed to quarrel with the view, that there are three principles of action--viz. sense, intellect, and appetite. But let us rather adopt a division adapted to all capacities--a thing which certainly is not to be obtained from philosophers. For they, when they would speak most plainly, divide the soul into appetite and intellect, but make both double. To the latter they sometimes give the name of contemplative, as being contented with mere knowledge and having no active powers (which circumstance makes Cicero designate it by the name of intellect, ingenii) (De Fin. lib. 5). At other times they give it the name of practical, because it variously moves the will by the apprehension of good or evil. Under this class is included the art of living well and justly. The former--viz. appetite--they divide into will and concupiscence, calling it bouvlesi", so whenever the appetite, which they call oJrmhv, obeys the reason. But when appetite, casting off the yoke of reason, runs to intemperance, they call it pavtho". Thus they always presuppose in man a reason by which he is able to guide himself aright.
There is no Aquinas at Briggs place this week. There is, instead, an interesting discussion of Apocalypse, Resist and Katechon: one who restrains. The times are difficult, and we need to stand. For the witness of Christ, and even, for the sake of our souls.