Translated from the Greek
14 This being the state of the case, we have to sketch what seem to us to be the marks of the (true) understanding of Scriptures. And, in the first place, this must be pointed out, that the object of the Spirit, which by the providence of God, through the Word who was in the beginning with God, illuminated the ministers of truth, the prophets and apostles, was especially (the communication) of ineffable mysteries regarding the affairs of men (now by men I mean those souls that make use of bodies), in order that he who is capable of instruction may by investigation, and by devoting himself to the study of the profundities of meaning contained in the words, become a participator of all the doctrines of his counsel. And among those matters which relate to souls (who cannot otherwise obtain perfection apart from the rich and wise truth of God), the (doctrines) belonging to God and His only-begotten Son are necessarily laid down as primary, viz., of what nature He is, and in what manner He is the Son of God, and what are the causes of His descending even to (the assumption of) human flesh, and of complete humanity; and what, also, is the operation of this (Son), and upon whom and when exercised. And it was necessary also that the subject of kindred beings, and other rational creatures, both those who are divine and those who have fallen from blessedness, together with the reasons of their fall, should be contained in the divine teaching; and also that of the diversities of souls, and of the origin of these diversities, and of the nature of the world, and the cause of its existence. We must learn also the origin of the great and terrible wickedness which overspreads the earth, and whether it is confined to this earth only, or prevails elsewhere. Now, while these and similar objects were present to the Spirit, who enlightened the souls of the holy ministers of the truth, there was a second object, for the sake of those who were unable to endure the fatigue of investigating matters so important, viz., to conceal the doctrine relating to the previously mentioned subjects, in expressions containing a narrative which conveyed an announcement regarding the things of the visible creation, the creation of man, and the successive descendants of the first men until they became numerous; and other histories relating the acts of just men, and the sins occasionally committed by these same men as being human beings, and the wicked deeds, both of unchastity and vice, committed by sinful and ungodly men. And what is most remarkable, by the history of wars, and of the victors, and the vanquished, certain mysteries are indicated to those who are able to test these statements. And more wonderful still, the laws of truth are predicted by the written legislation;— all these being described in a connected series, with a power which is truly in keeping with the wisdom of God. For it was intended that the covering also of the spiritual truths— I mean the “bodily” part of Scripture— should not be without profit in many cases, but should be capable of improving the multitude, according to their capacity.
15. But since, if the usefulness of the legislation, and the sequence and beauty of the history, were universally evident of itself, we should not believe that any other thing could be understood in the Scriptures save what was obvious, the word of God has arranged that certain stumbling-blocks, as it were, and offenses, and impossibilities, should be introduced into the midst of the law and the history, in order that we may not, through being drawn away in all directions by the merely attractive nature of the language, either altogether fall away from the (true) doctrines, as learning nothing worthy of God, or, by not departing from the letter, come to the knowledge of nothing more divine. And this also we must know, that the principal aim being to announce the “spiritual” connection in those things that are done, and that ought to be done, where the Word found that things done according to the history could be adapted to these mystical senses, He made use of them, concealing from the multitude the deeper meaning; but where, in the narrative of the development of super-sensual things, there did not follow the performance of those certain events, which was already indicated by the mystical meaning, the Scripture interwove in the history (the account of) some event that did not take place, sometimes what could not have happened; sometimes what could, but did not. And sometimes a few words are interpolated which are not true in their literal acceptation, and sometimes a larger number. And a similar practice also is to be noticed with regard to the legislation, in which is often to be found what is useful in itself, and appropriate to the times of the legislation; and sometimes also what does not appear to be of utility; and at other times impossibilities are recorded for the sake of the more skilful and inquisitive, in order that they may give themselves to the toil of investigating what is written, and thus attain to a becoming conviction of the manner in which a meaning worthy of God must be sought out in such subjects.
16. It was not only, however, with the (Scriptures composed) before the advent (of Christ) that the Spirit thus dealt; but as being the same Spirit, and (proceeding) from the one God, He did the same thing both with the evangelists and the apostles—as even these do not contain throughout a pure history of events, which are interwoven indeed according to the letter, but which did not actually occur. Nor even do the law and the commandments wholly convey what is agreeable to reason. For who that has understanding will suppose that the first, and second, and third day, and the evening and the morning, existed without a sun, and moon, and stars? And that the first day was, as it were, also without a sky? And who is so foolish as to suppose that God, after the manner of a husbandman, planted a paradise in Eden, towards the east, and placed in it a tree of life, visible and palpable, so that one tasting of the fruit by the bodily teeth obtained life? And again, that one was a partaker of good and evil by masticating what was taken from the tree? And if God is said to walk in the paradise in the evening, and Adam to hide himself under a tree, I do not suppose that anyone doubts that these things figuratively indicate certain mysteries, the history having taken place in appearance, and not literally. Cain also, when going forth from the presence of God, certainly appears to thoughtful men as likely to lead the reader to inquire what is the presence of God, and what is the meaning of going out from Him. And what need is there to say more, since those who are not altogether blind can collect countless instances of a similar kind recorded as having occurred, but which did not literally take place? Nay, the Gospels themselves are filled with the same kind of narratives; e.g., the devil leading Jesus up into a high mountain, in order to show him from thence the kingdoms of the whole world, and the glory of them. For who is there among those who do not read such accounts carelessly, that would not condemn those who think that with the eye of the body— which requires a lofty height in order that the parts lying (immediately) under and adjacent may be seen— the kingdoms of the Persians, and Scythians, and Indians, and Parthians, were beheld, and the manner in which their princes are glorified among men? And the attentive reader may notice in the Gospels innumerable other passages like these, so that he will be convinced that in the histories that are literally recorded, circumstances that did not occur are inserted.
Source: De Principiis (New Advent)