On Human Temptations
4 Let us now see what answer is usually returned to these statements by those who maintain that there is in us one movement, and one life, proceeding from one and the same soul, both the salvation and the destruction of which are ascribed to itself as a result of its own actions. And, in the first place, let us notice of what nature those commotions of the soul are which we suffer, when we feel ourselves inwardly drawn in different directions; when there arises a kind of contest of thoughts in our hearts, and certain probabilities are suggested us, agreeably to which we lean now to this side, now to that, and by which we are sometimes convicted of error, and sometimes approve of our acts. It is nothing remarkable, however, to say of wicked spirits, that they have a varying and conflicting judgment, and one out of harmony with itself, since such is found to be the case in all men, whenever, in deliberating upon an uncertain event, council is taken, and men consider and consult what is to be chosen as the better and more useful course. It is not therefore surprising that, if two probabilities meet, and suggest opposite views, they should drag the mind in contrary directions. For example, if a man be led by reflection to believe and to fear God, it cannot then be said that the flesh contends against the Spirit; but, amidst the uncertainty of what may be true and advantageous, the mind is drawn in opposite directions. So, also, when it is supposed that the flesh provokes to the indulgence of lust, but better counsels oppose allurements of that kind, we are not to suppose that it is one life which is resisting another, but that it is the tendency of the nature of the body, which is eager to empty out and cleanse the places filled with seminal moisture; as, in like manner, it is not to be supposed that it is any opposing power, or the life of another soul, which excites within us the appetite of thirst, and impels us to drink, or which causes us to feel hunger, and drives us to satisfy it. But as it is by the natural movements of the body that food and drink are either desired or rejected, so also the natural seed, collected together in course of time in the various vessels, has an eager desire to be expelled and thrown away, and is so far from never being removed, save by the impulse of some exciting cause, that it is even sometimes spontaneously emitted. When, therefore, it is said that “the flesh struggles against the Spirit,” these persons understand the expression to mean that habit or necessity, or the delights of the flesh, arouse a man, and withdraw him from divine and spiritual things. For, owing to the necessity of the body being drawn away, we are not allowed to have leisure for divine things, which are to be eternally advantageous. So again, the soul, devoting itself to divine and spiritual pursuits, and being united to the spirit, is said to fight against the flesh, by not permitting it to be relaxed by indulgence, and to become unsteady through the influence of those pleasures for which it feels a natural delight. In this way, also, they claim to understand the words, “The wisdom of the flesh is hostile to God,” not that the flesh really has a soul, or a wisdom of its own. But as we are accustomed to say, by an abuse of language, that the earth is thirsty, and wishes to drink in water, this use of the word “wishes” is not proper, but catachrestic,— as if we were to say again, that this house wants to be rebuilt, and many other similar expressions; so also is the wisdom of the flesh to be understood, or the expression, that “the flesh lusts against the Spirit.” They generally connect with these the expression, “The voice of your brother's blood cries unto Me from the ground.” For what cries unto the Lord is not properly the blood which was shed; but the blood is said improperly to cry out, vengeance being demanded upon him who had shed it. The declaration also of the apostle, “I see another law in my members, warring against the law of my mind,” they so understand as if he had said, That he who wishes to devote himself to the word of God is, on account of his bodily necessities and habits, which like a sort of law are ingrained in the body, distracted, and divided, and impeded, lest, by devoting himself vigorously to the study of wisdom, he should be enabled to behold the divine mysteries.
5. With respect, however, to the following being ranked among the works of the flesh, viz., heresies, and envyings, and contentions, or other (vices), they so understand the passage, that the mind, being rendered grosser in feeling, from its yielding itself to the passions of the body, and being oppressed by the mass of its vices, and having no refined or spiritual feelings, is said to be made flesh, and derives its name from that in which it exhibits more vigour and force of will. They also make this further inquiry, “Who will be found, or who will be said to be, the creator of this evil sense, called the sense of the flesh?” Because they defend the opinion that there is no other creator of soul and flesh than God. And if we were to assert that the good God created anything in His own creation that was hostile to Himself, it would appear to be a manifest absurdity. If, then, it is written, that “carnal wisdom is enmity against God,” and if this be declared to be a result of creation, God Himself will appear to have formed a nature hostile to Himself, which cannot be subject to Him nor to His law, as if it were (supposed to be) an animal of which such qualities are predicated. And if this view be admitted, in what respect will it appear to differ from that of those who maintain that souls of different natures are created, which, according to their natures, are destined either to be lost or saved? But this is an opinion of the heretics alone, who, not being able to maintain the justice of God on grounds of piety, compose impious inventions of this kind. And now we have brought forward to the best of our ability, in the person of each of the parties, what might be advanced by way of argument regarding the several views, and let the reader choose out of them for himself that which he thinks ought to be preferred.
Source: De Principiis (New Advent)