First I'd just like to focous on something, the part 'or even the precise words Jesus might have used simply do not matter' well, I know alot of Christians who would disagree, why? Because they take words or phrases and expound on them themselfs, they ask 'why did Jesus use these exact words?...I'll tell you why' and how many a sermons have I heard like this!
Yes, this is true. There are many sermons so based. There are also preachers who have used the Bible to justify slavery and all sorts of other ills. The foolishness of the expositor should reflect only on that one giving the sermon, not the source of it.
Of course, there are appropriate times to do a word study, but when doing so, one doesn't take a word in isolation, but in the context of the whole of scripture.
As for whether mistakes can change the message, even if I agree that they cannot, it would at least show that there is error, and how would a man then have pure certainty that the message has been preserved?
I agree wholeheartedly. That is why my Greek New Testament lists all of the variant readings for every passage where they occur. It tells the sources of each of those variant readings and gives the degree of reliability which can be resonably be assigned to any given reading.
So, would a man have pure certainty? No.
And those who understand textual criticism not only know this but readily admit it and are able in a very scientific way to compensate for it. You have this same thing in Islam with respect to confidence levels you place in the various hadiths of the prophet.
Pure certainty doesn't exist once you leave the person who first shared the message. There is no way of knowing with pure certainty, even when you have the right word, if the audience is receiving it in the same way that the speaker/writer intended it to be received without a feedback loop, and none is available in scripture (whether Christian or Islamic), except that Christians do also believe we are led in our understanding of scripture by the power of the Holy Spirit as to how to interpret it and apply it to our lives.
If they were working from Oral Tradition how would we be sure that they picked the truth from it and left the falsehood from such traditions?
Careful. I want to suggest to you that Islam also has an oral tradition, though I am sure you do not recognize it.
Consider this. What makes something an oral tradition? An oral tradition is wnen one hears a message and then passes it on to another before the message is written down. Now is this not exactly what occured with the Qur'an? Now, I know that you will say that it was checked and verified, but by whom was it checked and verified? Unless the original author of the message verified it, it isn't truly verified. And as I have been told many times, the author of the Qur'an is not Muhammad (pbuh), but Allah (swt). Did
Allah (swt) read and verify the Qur'an? Maybe so, but I have not heard that part of the story in the accounts I have read regarding the origin of the Qur'an. Verification woudl be Allah (swt) directly telling those who wrote it down on paper that it was true, to have it verified through some other source it becomes hearsay, not verification.
Ok, so let me ask, if mistakes have found their way into the Bible, as I understand you to have said, what gives you certainty, or reliability that the true picture of Jesus has been produced within the Biblical Scripture?
I saved this for last, for it is the part I really wanted to respond to the most.
If all we had was one person's story and that was it, with no ability to cross check it, then the confidence level would go down significantly. But that is not the case. We have 4 gospel accounts. We have the testimony of Peter, James, John, and Paul in various letters. We have the existence of the early church in which all of this message was shared and their ability to testify to its veracity or lack thereof. And, scant though it may be, we have some testimony from non-Christians as to a couple of details of Jesus' life and significantly more about the beliefs and practices of the earliest of those who were followers of Christ. This comes from Jews, Greeks and Romans. When all these are taken together, it presents a very coherent picture of Jesus and his message -- one I believe we can take great confidence in.
Now, another consideration, should one accept a message that has any element in it that is not 100% true? Well, first, I know of no message that is not open to more than one interpretation. I hold that to be true of the message of Islam also, if it were not so, there would not be both Sunni and Shi'a. And there would not be all of the various schools of Hannabi and others within Sunni Islam. But of course difference of interpretation and differences in telling what actually occurred are not the same thing, and I don't mean to say that they are.
Yet, different stories do not mean that one is lying. Indeed, I would suggest that even the truth is relative. I think today, post Einstein, we all understand the concepts of relativity. If one was to board a beam of light on the surface of the sun at noon exactly and take it to the earth, it would take 4 minutes for it to reach the Earth. If one then asked what time it was of an Earth based observer, that individual would say it was noon exactly, and the individual on the beam of light would also say the same thing, even though 4 minutes had passed. If the individual rode the beam of light from Earth to Mars, it would take another 8 minutes. Again the individual on the beam of light and the Mars based observer would say that it was noon exactly when the light arrived at Mars. But the earth based observer would say it was 8 minutes after noon. And yet one standing apart from it all would know that 12 minutes had past since that light was boarded at exactly 12 noon. Which one is telling the truth? Answer-- they all are. The difference is their relative points of observation. So the question has to be asked, relative to what point of reference is this statement true.
In the same way, context is important to understanding scripture. Often we think of context only as regards how we understand a passage. But context may also impact what the writers of scripture understood regarding the revelation of God relative to their limited abilty to perceive God.
I think of small children. While we all know that children have a tendancy to exaggerate and one has to be very careful with children's stories in searching for the truth. It happens to also be the case that very young children rarely just out and out lie. They are terrible liars because they don't have enough experience to make up a story. (Let them become teenagers first. :-[ ) But young children are also prone to magical thinking. So if a group of young children observed something, you may have a whole collection of very interesting stories, none of whom have it exactly right if we had been there to observe the event. Yet, listen to their stories and you will find the truth admist all the fanciful tales.
I think of the Israelite children in much the same vein. They were immature in their knowledge of God. But as God revealed God's self to them they related to it and recorded their experience from their perspective. If they went to battle and failed, and they knew that they still had some altars to Baal that had not been torn down, in their magical thinking they made the connection between these two events. If they then tore down the altars and went with more confidence into the next battle and won, this confirmed their way of thinking. Was it true? From their position, Yes it was. Would it have been true from some other vantage point? I don't think we can say today. From my vantage point with a faith that is also informed (in my opinion) more fully by the message of Jesus Christ, I think that perhaps some of the views of God expressed in the story of Israel are not quite fully formed. That does not make it false or wrong any more than the stories told by a group of children would be wrong. I for one let the revelation of God in Jesus Christ inform my reading of the Old Testament.
And I must also admit that even the stories regarding Jesus as found in the New Testament are subject to this possibility. Though I believe a complete revelation of God to have occured in the life and person of Jesus, those who recorded it were still imperfect human beings. And though inspired, they were not dictated to and thus they also bring their own particular bents to the writing process. I accept this and rather than being thrown off by the diverse ways in which the story is told, I embrace it and find in the whole something much richer than if we had one telling alone.