Clearly Christianity was a forbidden association at the time Celsus was writing (1.1). Moreover there is a strange emphasis on Christianity as a mystery religion which seems to point to Alexandria and the Alexandrian Church as his point of contact. He says it is a 'secret association' (συνθήκας κρύβδην 1.1) and specifically "of associations some are public, and that these are in accordance with the laws; others, again, secret (ἀφανεῖς), and maintained in violation of the laws." Celsus also speaks of 'secret Christian' beliefs (κρύφα Χριστιανοὺς 1.3) and the like but most interesting - going back to 1.1 - it is very apparent that Origen is not following the original order of the True Account at this section (i.e. early in Book 1). I think we can piece together where it originally stood in relation to.
Let's cite the section:
The stand alone 'Scythian' reference is quite striking and in my mind fits perfectly with this is and only this section of the treatise:The first point which Celsus brings forward, in his desire to throw discredit upon Christianity, is, that the Christians entered into secret associations with each other contrary to law, saying, that of associations some are public, and that these are in accordance with the laws; others, again, secret, and maintained in violation of the laws. And his wish is to bring into disrepute what are termed the love-feasts of the Christians, as if they had their origin in the common danger, and were more binding than any oaths. Since, then, he babbles about the public law, alleging that the associations of the Christians are in violation of it, we have to reply, that if a man were placed among Scythians, whose laws were unholy, and having no opportunity of escape, were compelled to live among them, such an one would with good reason, for the sake of the law of truth, which the Scythians would regard as wickedness, enter into associations contrary to their laws, with those like-minded with himself; so, if truth is to decide, the laws of the heathens which relate to images, and an atheistical polytheism, are Scythian laws, or more impious even than these, if there be any such. It is not irrational, then, to form associations in opposition to existing laws, if done for the sake of the truth. For as those persons would do well who should enter into a secret association in order to put to death a tyrant who had seized upon the liberties of a state, so Christians also, when tyrannized over by him who is called the devil, and by falsehood, form leagues contrary to the laws of the devil, against his power, and for the safety of those others whom they may succeed in persuading to revolt from a government which is, as it were, Scythian, and despotic.
As the Jews, then, became a peculiar people, and enacted laws in keeping with the customs of their country, and maintain them up to the present time, and observe a mode of worship which, whatever be its nature, is yet derived from their fathers, they act in these respects like other men, because each nation retains its ancestral customs, whatever they are, if they happen to be established among them. And such an arrangement appears to be advantageous, not only because it has occurred to the mind of other nations to decide some things differently, but also because it is a duty to protect what has been established for the public advantage; and also because, in all probability, the various quarters of the earth were from the beginning allotted to different superintending spirits, and were thus distributed among certain governing powers, and in this manner the administration of the world is carried on. And whatever is done among each nation in this way would be rightly done, wherever it was agreeable to the wishes (of the superintending powers), while it would be an act of impiety to get rid of the institutions established from the beginning in the various places. By these words Celsus shows that the Jews, who were formerly Egyptians, subsequently became a peculiar people, and enacted laws which they carefully preserve. And not to repeat his statements, which have been already before us, he says that it is advantageous to the Jews to observe their ancestral worship, as other nations carefully attend to theirs. And he further states a deeper reason why it is of advantage to the Jews to cultivate their ancestral customs, in hinting dimly that those to whom was allotted the office of superintending the country which was being legislated for, enacted the laws of each land in co-operation with its legislators. He appears, then, to indicate that both the country of the Jews, and the nation which inhabits it, are superintended by one or more beings, who, whether they were one or more, co-operated with Moses, and enacted the laws of the Jews.
Chapter 26
We must, he says, observe the laws, not only because it has occurred to the mind of others to decide some things differently, but because it is a duty to protect what has been enacted for the public advantage, and also because, in all probability, the various quarters of the earth were from the beginning allotted to different superintending spirits, and were distributed among certain governing powers, and in this manner the administration of the world is carried on. Thus Celsus, as if he had forgotten what he had said against the Jews, now includes them in the general eulogy which he passes upon all who observe their ancestral customs, remarking: And whatever is done among each nation in this way, would be rightly done whenever agreeable to the wishes (of the superintendents). And observe here, whether he does not openly, so far as he can, express a wish that the Jew should live in the observance of his own laws, and not depart from them, because he would commit an act of impiety if he apostatized; for his words are: It would be an act of impiety to get rid of the institutions established from the beginning in the various places. Now I should like to ask him, and those who entertain his views, who it was that distributed the various quarters of the earth from the beginning among the different superintending spirits; and especially, who gave the country of the Jews, and the Jewish people themselves, to the one or more superintendents to whom it was allotted? Was it, as Celsus would say, Jupiter who assigned the Jewish people and their country to a certain spirit or spirits? And was it his wish, to whom they were thus assigned, to enact among them the laws which prevail, or was it against his will that it was done? You will observe that, whatever be his answer, he is in a strait. But if the various quarters of the earth were not allotted by some one being to the various superintending spirits, then each one at random, and without the superintendence of a higher power, divided the earth according to chance; and yet such a view is absurd, and destructive in no small degree of the providence of the God who presides over all things.
Chapter 27
Any one, indeed, who chooses, may relate how the various quarters of the earth, being distributed among certain governing powers, are administered by those who superintend them; but let him tell us also how what is done among each nation is done rightly when agreeable to the wishes of the superintendents. Let him, for example, tell us whether the laws of the Scythians, which permit the murder of parents, are right laws; or those of the Persians, which do not forbid the marriages of sons with their mothers, or of daughters with their own fathers. But what need is there for me to make selections from those who have been engaged in the business of enacting laws among the different nations, and to inquire how the laws are rightly enacted among each, according as they please the superintending powers? Let Celsus, however, tell us how it would be an act of impiety to get rid of those ancestral laws which permit the marriages of mothers and daughters; or which pronounce a man happy who puts an end to his life by hanging, or declare that they undergo entire purification who deliver themselves over to the fire, and who terminate their existence by fire; and how it is an act of impiety to do away with those laws which, for example, prevail in the Tauric Chersonese, regarding the offering up of strangers in sacrifice to Diana, or among certain of the Libyan tribes regarding the sacrifice of children to Saturn. Moreover, this inference follows from the dictum of Celsus, that it is an act of impiety on the part of the Jews to do away with those ancestral laws which forbid the worship of any other deity than the Creator of all things. And it will follow, according to his view, that piety is not divine by its own nature, but by a certain (external) arrangement and appointment. For it is an act of piety among certain tribes to worship a crocodile, and to eat what is an object of adoration among other tribes; while, again, with others it is a pious act to worship a calf, and among others, again, to regard the goat as a god. And, in this way, the same individual will be regarded as acting piously according to one set of laws, and impiously according to another; and this is the most absurd result that can be conceived!
Chapter 28
It is probable, however, that to such remarks as the above, the answer returned would be, that he was pious who kept the laws of his own country, and not at all chargeable with impiety for the non-observance of those of other lands; and that, again, he who was deemed guilty of impiety among certain nations was not really so, when he worshipped his own gods, agreeably to his country's laws, although he made war against, and even feasted on, those who were regarded as divinities among those nations which possessed laws of an opposite kind. Now, observe here whether these statements do not exhibit the greatest confusion of mind regarding the nature of what is just, and holy, and religious; since there is no accurate definition laid down of these things, nor are they described as having a peculiar character of their own, and stamping as religious those who act according to their injunctions. If, then, religion, and piety, and righteousness belong to those things which are so only by comparison, so that the same act may be both pious and impious, according to different relations and different laws, see whether it will not follow that temperance also is a thing of comparison, and courage as well, and prudence, and the other virtues, than which nothing could be more absurd! What we have said, however, is sufficient for the more general and simple class of answers to the allegations of Celsus. But as we think it likely that some of those who are accustomed to deeper investigation will fall in with this treatise, let us venture to lay down some considerations of a profounder kind, conveying a mystical and secret view respecting the original distribution of the various quarters of the earth among different superintending spirits; and let us prove to the best of our ability, that our doctrine is free from the absurd consequences enumerated above.
Chapter 29
It appears to me, indeed, that Celsus has misunderstood some of the deeper reasons relating to the arrangement of terrestrial affairs, some of which are touched upon even in Grecian history, when certain of those who are considered to be gods are introduced as having contended with each other about the possession of Attica; while in the writings of the Greek poets also, some who are called gods are represented as acknowledging that certain places here are preferred by them before others. The history of barbarian nations, moreover, and especially that of Egypt, contains some such allusions to the division of the so-called Egyptian homes, when it states that Athena, who obtained Saïs by lot, is the same who also has possession of Attica. And the learned among the Egyptians can enumerate innumerable instances of this kind, although I do not know whether they include the Jews and their country in this division. And now, so far as testimonies outside the word of God bearing on this point are concerned, enough have been adduced for the present. We say, moreover, that our prophet of God and His genuine servant Moses, in his song in the book of Deuteronomy, makes a statement regarding the portioning out of the earth in the following terms: When the Most High divided the nations, when He dispersed the sons of Adam, He set the bounds of the people according to the number of the angels of God; and the portion was His people Jacob, and Israel the cord of His inheritance. And regarding the distribution of the nations, the same Moses, in his work entitled Genesis, thus expresses himself in the style of a historical narrative: And the whole earth was of one language and of one speech; and it came to pass, as they journeyed from the east, that they found a plain in the land of Shinar, and they dwelt there. A little further on he continues: And the Lord came down to see the city and the tower, which the children of men had built. And the Lord said, Behold, the people is one, and they have all one language; and this they have begun to do: and now nothing will be restrained from them which they have imagined to do. Go to, let Us go down, and there confound their language, that they may not understand one another's speech. And the Lord scattered them abroad from thence upon the face of all the earth: and they left off to build the city and the tower. Therefore is the name of it called Confusion; because the Lord did there confound the language of all the earth: and from thence did the Lord scatter them abroad upon the face of all the earth. In the treatise of Solomon, moreover, on Wisdom, and on the events at the time of the confusion of languages, when the division of the earth took place, we find the following regarding Wisdom: Moreover, the nations in their wicked conspiracy being confounded, she found out the righteous, and preserved him blameless unto God, and kept him strong in his tender compassion towards his son. Wisdom 10:5 But on these subjects much, and that of a mystical kind, might be said; in keeping with which is the following: It is good to keep close the secret of a king, — in order that the doctrine of the entrance of souls into bodies (not, however, that of the transmigration from one body into another) may not be thrown before the common understanding, nor what is holy given to the dogs, nor pearls be cast before swine. For such a procedure would be impious, being equivalent to a betrayal of the mysterious declarations of God's wisdom, of which it has been well said: Into a malicious soul wisdom shall not enter, nor dwell in a body subject to sin. Wisdom 1:4 It is sufficient, however, to represent in the style of a historic narrative what is intended to convey a secret meaning in the garb of history, that those who have the capacity may work out for themselves all that relates to the subject. (The narrative, then, may be understood as follows.)