The best way to determine this is to apply the methods of investigation used to determine whether or not any ancient piece of literature has been passed down in a reliable form. When such standards are used it is clear that the New Testament texts are very reliable compared to other documents.
- There are very early copies available which comes from eyewitnesses while hostile contemporaries aren’t able to refute the evidence;
- there are over 15,000 copies and there is substantial agreement between them;
- almost all the differences between copies do not effect the meaning while undisputed passages show how to read the remaining differences;
- specific factual details can be verified and have been through comparing to other sources including archeology.
- Add to this that the more recent copies of Old Testament texts match well with the Dead Sea scrolls which date to Jesus’ time.
These evidences show that the Biblical texts have been passed down with great care, being faithfully copied.