I will only accept Primary Sources in context, not opinions.
Here is an example of a primary source:
Chapter 9
But as Celsus promises to give an account of the manner in which prophecies are delivered in Phœnicia and Palestine, speaking as though it were a matter with which he had a full and personal acquaintance, let us see what he has to say on the subject. First he lays it down that there are several kinds of prophecies, but he does not specify what they are; indeed, he could not do so, and the statement is a piece of pure ostentation. However, let us see what he considers the most perfect kind of prophecy among these nations. There are many, he says, who, although of no name, with the greatest facility and on the slightest occasion, whether within or without temples, assume the motions and gestures of inspired persons; while others do it in cities or among armies, for the purpose of attracting attention and exciting surprise. These are accustomed to say, each for himself, 'I am God; I am the Son of God; or, I am the Divine Spirit; I have come because the world is perishing, and you, O men, are perishing for your iniquities. But I wish to save you, and you shall see me returning again with heavenly power. Blessed is he who now does me homage. On all the rest I will send down eternal fire, both on cities and on countries. And those who know not the punishments which await them shall repent and grieve in vain; while those who are faithful to me I will preserve eternally.' Then he goes on to say: To these promises are added strange, fanatical, and quite unintelligible words, of which no rational person can find the meaning: for so dark are they, as to have no meaning at all; but they give occasion to every fool or impostor to apply them to suit his own purposes.
Chapter 10
But if he were dealing honestly in his accusations, he ought to have given the exact terms of the prophecies, whether those in which the speaker is introduced as claiming to be God Almighty, or those in which the Son of God speaks, or finally those under the name of the Holy Spirit. For thus he might have endeavoured to overthrow these assertions, and have shown that there was no divine inspiration in those words which urged men to forsake their sins, which condemned the past and foretold the future. For the prophecies were recorded and preserved by men living at the time, that those who came after might read and admire them as the oracles of God, and that they might profit not only by the warnings and admonitions, but also by the predictions, which, being shown by events to have proceeded from the Spirit of God, bind men to the practice of piety as set forth in the law and the prophets. The prophets have therefore, as God commanded them, declared with all plainness those things which it was desirable that the hearers should understand at once for the regulation of their conduct; while in regard to deeper and more mysterious subjects, which lay beyond the reach of the common understanding, they set them forth in the form of enigmas and allegories, or of what are called dark sayings, parables, or similitudes. And this plan they have followed, that those who are ready to shun no labour and spare no pains in their endeavours after truth and virtue might search into their meaning, and having found it, might apply it as reason requires. But Celsus, ever vigorous in his denunciations, as though he were angry at his inability to understand the language of the prophets, scoffs at them thus: To these grand promises are added strange, fanatical, and quite unintelligible words, of which no rational person can find the meaning; for so dark are they as to have no meaning at all; but they give occasion to every fool or impostor to apply them so as to suit his own purposes. This statement of Celsus seems ingeniously designed to dissuade readers from attempting any inquiry or careful search into their meaning. And in this he is not unlike certain persons, who said to a man whom a prophet had visited to announce future events, Wherefore came this mad fellow to you?
Chapter 11
I am convinced, indeed, that much better arguments could be adduced than any I have been able to bring forward, to show the falsehood of these allegations of Celsus, and to set forth the divine inspiration of the prophecies; but we have according to our ability, in our commentaries on Isaiah, Ezekiel, and some of the twelve minor prophets, explained literally and in detail what he calls those fanatical and utterly unintelligible passages. And if God give us grace in the time that He appoints for us, to advance in the knowledge of His word, we shall continue our investigation into the parts which remain, or into such at least as we are able to make plain. And other persons of intelligence who wish to study Scripture may also find out its meaning for themselves; for although there are many places in which the meaning is not obvious, yet there are none where, as Celsus affirms, there is no sense at all. Neither is it true that any fool or impostor can explain the passages so as to make them suit his own purposes. For it belongs only to those who are wise in the truth of Christ (and to all them it does belong) to unfold the connection and meaning of even the obscure parts of prophecy, comparing spiritual things with spiritual, and interpreting each passage according to the usage of Scripture writers. And Celsus is not to be believed when he says that he has heard such men prophesy; for no prophets bearing any resemblance to the ancient prophets have appeared in the time of Celsus. If there had been any, those who heard and admired them would have followed the example of the ancients, and have recorded the prophecies in writing. And it seems quite clear that Celsus is speaking falsely, when he says that those prophets whom he had heard, on being pressed by him, confessed their true motives, and acknowledged that the ambiguous words they used really meant nothing. He ought to have given the names of those whom he says he had heard, if he had any to give, so that those who were competent to judge might decide whether his allegations were true or false.
http://www.newadvent.org/fathers/04167.htm
Here is an example of a primary source:
Chapter 9
But as Celsus promises to give an account of the manner in which prophecies are delivered in Phœnicia and Palestine, speaking as though it were a matter with which he had a full and personal acquaintance, let us see what he has to say on the subject. First he lays it down that there are several kinds of prophecies, but he does not specify what they are; indeed, he could not do so, and the statement is a piece of pure ostentation. However, let us see what he considers the most perfect kind of prophecy among these nations. There are many, he says, who, although of no name, with the greatest facility and on the slightest occasion, whether within or without temples, assume the motions and gestures of inspired persons; while others do it in cities or among armies, for the purpose of attracting attention and exciting surprise. These are accustomed to say, each for himself, 'I am God; I am the Son of God; or, I am the Divine Spirit; I have come because the world is perishing, and you, O men, are perishing for your iniquities. But I wish to save you, and you shall see me returning again with heavenly power. Blessed is he who now does me homage. On all the rest I will send down eternal fire, both on cities and on countries. And those who know not the punishments which await them shall repent and grieve in vain; while those who are faithful to me I will preserve eternally.' Then he goes on to say: To these promises are added strange, fanatical, and quite unintelligible words, of which no rational person can find the meaning: for so dark are they, as to have no meaning at all; but they give occasion to every fool or impostor to apply them to suit his own purposes.
Chapter 10
But if he were dealing honestly in his accusations, he ought to have given the exact terms of the prophecies, whether those in which the speaker is introduced as claiming to be God Almighty, or those in which the Son of God speaks, or finally those under the name of the Holy Spirit. For thus he might have endeavoured to overthrow these assertions, and have shown that there was no divine inspiration in those words which urged men to forsake their sins, which condemned the past and foretold the future. For the prophecies were recorded and preserved by men living at the time, that those who came after might read and admire them as the oracles of God, and that they might profit not only by the warnings and admonitions, but also by the predictions, which, being shown by events to have proceeded from the Spirit of God, bind men to the practice of piety as set forth in the law and the prophets. The prophets have therefore, as God commanded them, declared with all plainness those things which it was desirable that the hearers should understand at once for the regulation of their conduct; while in regard to deeper and more mysterious subjects, which lay beyond the reach of the common understanding, they set them forth in the form of enigmas and allegories, or of what are called dark sayings, parables, or similitudes. And this plan they have followed, that those who are ready to shun no labour and spare no pains in their endeavours after truth and virtue might search into their meaning, and having found it, might apply it as reason requires. But Celsus, ever vigorous in his denunciations, as though he were angry at his inability to understand the language of the prophets, scoffs at them thus: To these grand promises are added strange, fanatical, and quite unintelligible words, of which no rational person can find the meaning; for so dark are they as to have no meaning at all; but they give occasion to every fool or impostor to apply them so as to suit his own purposes. This statement of Celsus seems ingeniously designed to dissuade readers from attempting any inquiry or careful search into their meaning. And in this he is not unlike certain persons, who said to a man whom a prophet had visited to announce future events, Wherefore came this mad fellow to you?
Chapter 11
I am convinced, indeed, that much better arguments could be adduced than any I have been able to bring forward, to show the falsehood of these allegations of Celsus, and to set forth the divine inspiration of the prophecies; but we have according to our ability, in our commentaries on Isaiah, Ezekiel, and some of the twelve minor prophets, explained literally and in detail what he calls those fanatical and utterly unintelligible passages. And if God give us grace in the time that He appoints for us, to advance in the knowledge of His word, we shall continue our investigation into the parts which remain, or into such at least as we are able to make plain. And other persons of intelligence who wish to study Scripture may also find out its meaning for themselves; for although there are many places in which the meaning is not obvious, yet there are none where, as Celsus affirms, there is no sense at all. Neither is it true that any fool or impostor can explain the passages so as to make them suit his own purposes. For it belongs only to those who are wise in the truth of Christ (and to all them it does belong) to unfold the connection and meaning of even the obscure parts of prophecy, comparing spiritual things with spiritual, and interpreting each passage according to the usage of Scripture writers. And Celsus is not to be believed when he says that he has heard such men prophesy; for no prophets bearing any resemblance to the ancient prophets have appeared in the time of Celsus. If there had been any, those who heard and admired them would have followed the example of the ancients, and have recorded the prophecies in writing. And it seems quite clear that Celsus is speaking falsely, when he says that those prophets whom he had heard, on being pressed by him, confessed their true motives, and acknowledged that the ambiguous words they used really meant nothing. He ought to have given the names of those whom he says he had heard, if he had any to give, so that those who were competent to judge might decide whether his allegations were true or false.
http://www.newadvent.org/fathers/04167.htm
