1 In writing to the illustrious and most eloquent Volusianus, whom we both sincerely love, I thought it right to confine myself to answering the questions which he thought proper himself to state; but as to the questions which you have submitted to me in your letter for discussion and solution, as suggested or proposed either by Volusianus himself or by others, it is fitting that such reply to these as I may be able to give should be addressed to you. I shall attempt this, not in the manner in which it would require to be done in a formal treatise, but in the manner which is suitable to the conversational familiarity of a letter, in order that, if you, who know their state of mind by daily discussions, think it expedient, this letter also may be read to your friends. But if this communication be not adapted to them, because of their not being prepared by the piety of faith to give ear to it, let what you consider adapted to them be in the first place prepared between ourselves, and afterwards let what may have been thus prepared be communicated to them. For there are many things from which their minds may in the meantime shrink and recoil, which they may perhaps by and by be persuaded to accept as true, either by the use of more copious and skilful arguments, or by an appeal to authority which, in their opinion, may not without impropriety be resisted.
2. In your letter you state that some are perplexed by the question, “Why this God, who is proved to be the God also of the Old Testament, is pleased with new sacrifices after having rejected the ancient ones. For they allege that nothing can be corrected but that which is proved to have been previously not rightly done, or that what has once been done rightly ought not to be altered in the very least: that which has been rightly done, they say, cannot be changed without wrong.” I quote these words from your letter. Were I disposed to give a copious reply to this objection, time would fail me long before I had exhausted the instances in which the processes of nature itself and the works of men undergo changes according to the circumstances of the time, while, at the same time, there is nothing mutable in the plan or principle by which these changes are regulated. Of these I may mention a few, that, stimulated by them, your wakeful observation may run, as it were, from them to many more of the same kind. Does not summer follow winter, the temperature gradually increasing in warmth? Do not night and day in turn succeed each other? How often do our own lives experience changes! Boyhood departing, never to return, gives place to youth; manhood, destined itself to continue only for a season, takes in turn the place of youth; and old age, closing the term of manhood, is itself closed by death. All these things are changed, but the plan of Divine Providence which appoints these successive changes is not changed. I suppose, also, that the principles of agriculture are not changed when the farmer appoints a different work to be done in summer from that which he had ordered in winter. He who rises in the morning, after resting by night, is not supposed to have changed the plan of his life. The schoolmaster gives to the adult different tasks from those which he was accustomed to prescribe to the scholar in his boyhoo; his teaching, consistent throughout, changes the instruction when the lesson is changed, without itself being changed.
3. The eminent physician of our own times, Vindicianus, being consulted by an invalid, prescribed for his disease what seemed to him a suitable remedy at that time; health was restored by its use. Some years afterwards, finding himself troubled again with the same disorder, the patient supposed that the same remedy should be applied; but its application made his illness worse. In astonishment, he again returns to the physician, and tells him what had happened; whereupon he, being a man of very quick penetration, answered: “The reason of your having been harmed by this application is, that I did not order it;” upon which all who heard the remark and did not know the man supposed that he was trusting not in the art of medicine, but in some forbidden supernatural power. When he was afterwards questioned by some who were amazed at his words, he explained what they had not understood, namely, that he would not have prescribed the same remedy to the patient at the age which he had now attained. While, therefore, the principle and methods of art remain unchanged, the change which, in accordance with them, may be made necessary by the difference of times is very great.
4. To say then, that what has once been done rightly must in no respect whatever be changed, is to affirm what is not true. For if the circumstances of time which occasioned anything be changed, true reason in almost all cases demands that what had been in the former circumstances rightly done, be now so altered that, although they say that it is not rightly done if it be changed, truth, on the contrary, protests that it is not rightly done unless it be changed; because, at both times, it will be rightly done if the difference be regulated according to the difference in the times. For just as in the cases of different persons it may happen that, at the same moment, one man may do with impunity what another man may not, because of a difference not in the thing done but in the person who does it, so in the case of one and the same person at different times, that which was duty formerly is not duty now, not because the person is different from his former self, but because the time at which he does it is different.
5. The wide range opened up by this question may be seen by any one who is competent and careful to observe the contrast between the beautiful and the suitable, examples of which are scattered, we may say, throughout the universe. For the beautiful, to which the ugly and deformed is opposed, is estimated and praised according to what it is in itself. But the suitable, to which the incongruous is opposed, depends on something else to which it is bound, and is estimated not according to what it is in itself, but according to that with which it is connected: the contrast, also, between becoming and unbecoming is either the same, or at least regarded as the same. Now apply what we have said to the subject in hand. The divine institution of sacrifice was suitable in the former dispensation, but is not suitable now. For the change suitable to the present age has been enjoined by God, who knows infinitely better than man what is fitting for every age, and who is, whether He give or add, abolish or curtail, increase or diminish, the unchangeable Governor as He is the unchangeable Creator of mutable things, ordering all events in His providence until the beauty of the completed course of time, the component parts of which are the dispensations adapted to each successive age, shall be finished, like the grand melody of some ineffably wise master of song, and those pass into the eternal immediate contemplation of God who here, though it is a time of faith, not of sight, are acceptably worshipping Him.
6. They are mistaken, moreover, who think that God appoints these ordinances for His own advantage or pleasure; and no wonder that, being thus mistaken, they are perplexed, as if it was from a changing mood that He ordered one thing to be offered to Him in a former age, and something else now. But this is not the case. God enjoins nothing for His own advantage, but for the benefit of those to whom the injunction is given. Therefore He is truly Lord, for He does not need His servants, but His servants stand in need of Him. In those same Old Testament Scriptures, and in the age in which sacrifices were still being offered that are now abrogated, it is said: “I said unto the Lord, You are my God, for You do not need my good things.” Wherefore God did not stand in need of those sacrifices, nor does He ever need anything; but there are certain acts, symbolic of these divine gifts, whereby the soul receives either present grace or eternal glory, in the celebration and practice of which, pious exercises, serviceable not to God but to ourselves, are performed.
Source: Letters (New Advent)