I am not sayings it changed, I am just saying that there is a history to the quran.

Its only fanciful imaginings that say that the quran was so thoroughly memorised that its complete.

We know that after a battle so many older muslim men died, that the caliph said that they would never be able to get the quran now.

Its not a matter of the Bible being corrupted. The Bible is a history, that is all.
The Majority of Christians do not subscribe to sola-scriptura.

Muslims cannot understand this since their faith is based on sola-scriptura, or only the scripture.

We base our faith not on the Bible, for what is that but a book, but on the living God that leads us forever.

I know this idea is very hard for muslims to understand since, their next question is,
From where do you know about this God, then?

The answer lies in 2 parts, its in the Bible, but the Bible only teaches you the understanding of God. To build a relationship one must then forget the Bible, and learn God.

Many muslims understand this concept, maybe to suggest to them that they should forget the quran to learn about God is too much for them to bear. Still that is the truth.
A Christian must forget the Bible, a muslim must forget the quran, so long as you hold onto these things, you are an idolator, because you have set up a god (in this book) besides the true God.

Only then can you be a true worshipper of God.