On Christian Doctrine
Chapter 28. To What Extent History is an Aid
42. Anything, then, that we learn from history about the chronology of past times assists us very much in understanding the Scriptures, even if it be learnt without the pale of the Church as a matter of childish instruction. For we frequently seek information about a variety of matters by use of the Olympiads, and the names of the consuls; and ignorance of the consulship in which our Lord was born, and that in which He suffered, has led some into the error of supposing that He was forty-six years of age when He suffered, that being the number of years He was told by the Jews the temple (which He took as a symbol of His body) was in building. Now we know on the authority of the evangelist that He was about thirty years of age when He was baptized; but the number of years He lived afterwards, although by putting His actions together we can make it out, yet that no shadow of doubt might arise from another source, can be ascertained more clearly and more certainly from a comparison of profane history with the gospel. It will still be evident, however, that it was not without a purpose it was said that the temple was forty and six years in building; so that, as more secret formation of the body which, for our sakes, the only-begotten Son of God, by whom all things were made, condescended to put on.
43. As to the utility of history, moreover, passing over the Greeks, what a great question our own Ambrose has set at rest! For, when the readers and admirers of Plato dared calumniously to assert that our Lord Jesus Christ learnt all those sayings of His, which they are compelled to admire and praise, from the books of Plato—because (they urged) it cannot be denied that Plato lived long before the coming of our Lord!—did not the illustrious bishop, when by his investigations into profane history he had discovered that Plato made a journey into Egypt at the time when Jeremiah the prophet was there, show that it is much more likely that Plato was through Jeremiah’s means initiated into our literature, so as to be able to teach and write those views of his which are so justly praised? For not even Pythagoras himself, from whose successors these men assert Plato learnt theology, lived at a date prior to the books of that Hebrew race, among whom the worship of one God sprang up, and of whom as concerning the flesh our Lord came. And thus, when we reflect upon the dates, it becomes much more probable that those philosophers learnt whatever they said that was good and true from our literature, than that the Lord Jesus Christ learnt from the writings of Plato,—a thing which it is the height of folly to believe.
44. And even when in the course of an historical narrative former institutions of men are described, the history itself is not to be reckoned among human institutions; because things that are past and gone and cannot be undone are to be reckoned as belonging to the course of time, of which God is the author and governor. For it is one thing to tell what has been done, another to show what ought to be done. History narrates what has been done, faithfully and with advantage; but the books of the haruspices, and all writings of the same kind, aim at teaching what ought to be done or observed, using the boldness of an adviser, not the fidelity of a narrator.
Chapter 29. To What Extent Natural Science is an Exegetical Aid
45. There is also a species of narrative resembling description, in which not a past but an existing state of things is made known to those who are ignorant of it. To this species belongs all that has been written about the situation of places, and the nature of animals, trees, herbs, stones, and other bodies. And of this species I have treated above, and have shown that this kind of knowledge is serviceable in solving the difficulties of Scripture, not that these objects are to be used conformably to certain signs as nostrums or the instruments of superstition; for that kind of knowledge I have already set aside as distinct from the lawful and free kind now spoken of. For it is one thing to say: If you bruise down this herb and drink it, it will remove the pain from your stomach; and another to say: If you hang this herb round your neck, it will remove the pain from your stomach. In the former case the wholesome mixture is approved of, in the latter the superstitious charm is condemned; although indeed, where incantations and invocations and marks are not used, it is frequently doubtful whether the thing that is tied or fixed in any way to the body to cure it, acts by a natural virtue, in which case it may be freely used; or acts by a sort of charm, in which case it becomes the Christian to avoid it the more carefully, the more efficacious it may seem to be. But when the reason why a thing is of virtue does not appear, the intention with which it is used is of great importance, at least in healing or in tempering bodies, whether in medicine or in agriculture.
46. The knowledge of the stars, again, is not a matter of narration, but of description. Very few of these, however, are mentioned in Scripture. And as the course of the moon, which is regularly employed in reference to celebrating the anniversary of our Lord’s passion, is known to most people; so the rising and setting and other movements of the rest of the heavenly bodies are thoroughly known to very few. And this knowledge, although in itself it involves no superstition, renders very little, indeed almost no assistance, in the interpretation of Holy Scripture, and by engaging the attention unprofitably is a hindrance rather; and as it is closely related to the very pernicious error of the diviners of the fates, it is more convenient and becoming to neglect it. It involves, moreover, in addition to a description of the present state of things, something like a narrative of the past also; because one may go back from the present position and motion of the stars, and trace by rule their past movements. It involves also regular anticipations of the future, not in the way of forebodings and omens, but by way of sure calculation; not with the design of drawing any information from them as to our own acts and fates, in the absurd fashion of the genethliaci, but only as to the motions of the heavenly bodies themselves. For, as the man who computes the moon’s age can tell, when he has found out her age today, what her age was any number of years ago, or what will be her age any number of years hence, in just the same way men who are skilled in such computations are accustomed to answer like questions about every one of the heavenly bodies. And I have stated what my views are about all this knowledge, so far as regards its utility.
Chapter 30. What the Mechanical Arts Contribute to Exegetics
47. Further, as to the remaining arts, whether those by which something is made which, when the effort of the workman is over, remains as a result of his work, as, for example, a house, a bench, a dish, and other things of that kind; or those which, so to speak, assist God in His operations, as medicine, and agriculture, and navigation; or those whose sole result is an action, as dancing, and racing, and wrestling;—in all these arts experience teaches us to infer the future from the past. For no man who is skilled in any of these arts moves his limbs in any operation without connecting the memory of the past with the expectation of the future. Now of these arts a very superficial and cursory knowledge is to be acquired, not with a view to practising them (unless some duty compel us, a matter on which I do not touch at present), but with a view to forming a judgment about them, that we may not be wholly ignorant of what Scripture means to convey when it employs figures of speech derived from these arts.
Chapter 31. Use of Dialectics. Of Fallacies
48. There remain those branches of knowledge which pertain not to the bodily senses, but to the intellect, among which the science of reasoning and that of number are the chief. The science of reasoning is of very great service in searching into and unravelling all sorts of questions that come up in Scripture, only in the use of it we must guard against the love of wrangling, and the childish vanity of entrapping an adversary. For there are many of what are called sophisms, inferences in reasoning that are false, and yet so close an imitation of the true, as to deceive not only dull people, but clever men too, when they are not on their guard. For example, one man lays before another with whom he is talking, the proposition, “What I am, you are not.” The other assents, for the proposition is in part true, the one man being cunning and the other simple. Then the first speaker adds: “I am a man;” and when the other has given his assent to this also, the first draws his conclusion: “Then you are not a man.” Now of this sort of ensnaring arguments, Scripture, as I judge, expresses detestation in that place where it is said, “There is one that showeth wisdom in words, and is hated;” although, indeed, a style of speech which is not intended to entrap, but only aims at verbal ornamentation more than is consistent with seriousness of purpose, is also called sophistical.
49. There are also valid processes of reasoning which lead to false conclusions, by following out to its logical consequences the error of the man with whom one is arguing; and these conclusions are sometimes drawn by a good and learned man, with the object of making the person from whose error these consequences result, feel ashamed of them and of thus leading him to give up his error when he finds that if he wishes to retain his old opinion, he must of necessity also hold other opinions which he condemns. For example, the apostle did not draw true conclusions when he said, “Then is Christ not risen,” and again, “Then is our preaching vain, and your faith is also vain;” and further on drew other inferences which are all utterly false; for Christ has risen, the preaching of those who declared this fact was not in vain, nor was their faith in vain who had believed it. But all these false inferences followed legitimately from the opinion of those who said that there is no resurrection of the dead. These inferences, then, being repudiated as false, it follows that since they would be true if the dead rise not, there will be a resurrection of the dead. As, then, valid conclusions may be drawn not only from true but from false propositions, the laws of valid reasoning may easily be learnt in the schools, outside the pale of the Church. But the truth of propositions must be inquired into in the sacred books of the Church.
Chapter 32. Valid Logical Sequence is Not Devised But Only Observed by Man
50. And yet the validity of logical sequences is not a thing devised by men, but is observed and noted by them that they may be able to learn and teach it; for it exists eternally in the reason of things, and has its origin with God. For as the man who narrates the order of events does not himself create that order; and as he who describes the situations of places, or the natures of animals, or roots, or minerals, does not describe arrangements of man; and as he who points out the stars and their movements does not point out anything that he himself or any other man has ordained;—in the same way, he who says, “When the consequent is false, the antecedent must also be false,” says what is most true; but he does not himself make it so, he only points out that it is so. And it is upon this rule that the reasoning I have quoted from the Apostle Paul proceeds. For the antecedent is, “There is no resurrection of the dead,”—the position taken up by those whose error the apostle wished to overthrow. Next, from this antecedent, the assertion, viz., that there is no resurrection of the dead, the necessary consequence is, “Then Christ is not risen.” But this consequence is false, for Christ has risen; therefore the antecedent is also false. But the antecedent is, that there is no resurrection of the dead. We conclude, therefore, that there is a resurrection of the dead. Now all this is briefly expressed thus: If there is no resurrection of the dead, then is Christ not risen; but Christ is risen, therefore there is a resurrection of the dead. This rule, then, that when the consequent is removed, the antecedent must also be removed, is not made by man, but only pointed out by him. And this rule has reference to the validity of the reasoning, not to the truth of the statements.