De Principiis

¹ Some such opinions, we believe, ought to be entertained regarding the divine promises, when we direct our understanding to the contemplation of that eternal and infinite world, and gaze on its ineffable joy and blessedness. But as the preaching of the Church includes a belief in a future and just judgment of God, which belief incites and persuades men to a good and virtuous life, and to an avoidance of sin by all possible means; and as by this it is undoubtedly indicated that it is within our own power to devote ourselves either to a life that is worthy of praise, or to one that is worthy of censure, I therefore deem it necessary to say a few words regarding the freedom of the will, seeing that this topic has been treated by very many writers in no mean style. And that we may ascertain more easily what is the freedom of the will, let us inquire into the nature of will and of desire.

2. Of all things which move, some have the cause of their motion within themselves, others receive it from without: and all those things only are moved from without which are without life, as stones, and pieces of wood, and whatever things are of such a nature as to be held together by the constitution of their matter alone, or of their bodily substance. That view must indeed be dismissed which would regard the dissolution of bodies by corruption as motion, for it has no bearing upon our present purpose. Others, again, have the cause of motion in themselves, as animals, or trees, and all things which are held together by natural life or soul; among which some think ought to be classed the veins of metals. Fire, also, is supposed to be the cause of its own motion, and perhaps also springs of water. And of those things which have the causes of their motion in themselves, some are said to be moved out of themselves, others by themselves. And they so distinguish them, because those things are moved out of themselves which are alive indeed, but have no soul; whereas those things which have a soul are moved by themselves, when a phantasy, i.e., a desire or incitement, is presented to them, which excites them to move towards something. Finally, in certain things endowed with a soul, there is such a phantasy, i.e., a will or feeling, as by a kind of natural instinct calls them forth, and arouses them to orderly and regular motion; as we see to be the case with spiders, which are stirred up in a most orderly manner by a phantasy, i.e., a sort of wish and desire for weaving, to undertake the production of a web, some natural movement undoubtedly calling forth the effort to work of this kind. Nor is this very insect found to possess any other feeling than the natural desire of weaving; as in like manner bees also exhibit a desire to form honeycombs, and to collect, as they say, aerial honey.

3. But since a rational animal not only has within itself these natural movements, but has moreover, to a greater extent than other animals, the power of reason, by which it can judge and determine regarding natural movements, and disapprove and reject some, while approving and adopting others, so by the judgment of this reason may the movements of men be governed and directed towards a commendable life. And from this it follows that, since the nature of this reason which is in man has within itself the power of distinguishing between good and evil, and while distinguishing possesses the faculty of selecting what it has approved, it may justly be deemed worthy of praise in choosing what is good, and deserving of censure in following that which is base or wicked. This indeed must by no means escape our notice, that in some dumb animals there is found a more regular movement than in others, as in hunting-dogs or war-horses, so that they may appear to some to be moved by a kind of rational sense. But we must believe this to be the result not so much of reason as of some natural instinct, largely bestowed for purposes of that kind. Now, as we had begun to remark, seeing that such is the nature of a rational animal, some things may happen to us human beings from without; and these, coming in contact with our sense of sight, or hearing, or any other of our senses, may incite and arouse us to good movements, or the contrary; and seeing they come to us from an external source, it is not within our own power to prevent their coming. But to determine and approve what use we ought to make of those things which thus happen, is the duty of no other than of that reason within us, i.e., of our own judgment; by the decision of which reason we use the incitement, which comes to us from without for that purpose, which reason approves, our natural movements being determined by its authority either to good actions or the reverse.

4. If any one now were to say that those things which happen to us from an external cause, and call forth our movements, are of such a nature that it is impossible to resist them, whether they incite us to good or evil, let the holder of this opinion turn his attention for a little upon himself, and carefully inspect the movements of his own mind, unless he has discovered already, that when an enticement to any desire arises, nothing is accomplished until the assent of the soul is gained, and the authority of the mind has granted indulgence to the wicked suggestion; so that a claim might seem to be made by two parties on certain probable grounds as to a judge residing within the tribunals of our heart, in order that, after the statement of reasons, the decree of execution may proceed from the judgment of reason. For, to take an illustration: if, to a man who has determined to live continently and chastely, and to keep himself free from all pollution with women, a woman should happen to present herself, inciting and alluring him to act contrary to his purpose, that woman is not a complete and absolute cause or necessity of his transgressing, since it is in his power, by remembering his resolution, to bridle the incitements to lust, and by the stern admonitions of virtue to restrain the pleasure of the allurement that solicits him; so that, all feeling of indulgence being driven away, his determination may remain firm and enduring. Finally, if to any men of learning, strengthened by divine training, allurements of that kind present themselves, remembering immediately what they are, and calling to mind what has long been the subject of their meditation and instruction, and fortifying themselves by the support of a holier doctrine, they reject and repel all incitement to pleasure, and drive away opposing lusts by the interposition of the reason implanted within them.