The internal evidence of the NT shows an immediate expectation and acceptance of the writings of the apostles. From the Church Fathers, we can see that the sub-corpus of the 4 gospels and the book of Acts were accepted extremely early and exclusively. The letters of Paul were copied, transmitted, and read across the entire population of Christians including his personal letters and the sub-corpus of Paul’s 13 letters were assembled together. Even heretical and gnostic writings confirm the early existence of the gospels in that it is the gospels that they mimic and never the other way around.

The New Testament did not drop out of heaven. It was authored and published in the same manner as any other book. 2 Pet 1:21 describes how men were carried along by the Holy Spirit like a boat is carried along by the wind. They were not replaced by God but he managed the process. There is no angel whispering in a cave to one person in the Christian view of inspiration. We have multiple attestations with historical veracity of the public deeds and words of Jesus, his apostles, and their followers. We have overwhelming evidence that the 4 gospels, Acts, and 13 epistles of Paul were immediately received, copied and disseminated. This includes Greek copies as well as near immediate translations into other languages.
 

Muslims are taught that the Bible has been corrupted. The King James Bible is often marched out as the origin of the corruption of the English Bibles that we have today. This article explains how the English Bibles we have today are not dependent on the King James Bible. In fact, they are translated from a very ancient source.