What "reliability" can mean
Asking whether the New Testament is reliable is really asking several questions at once: Were the texts transmitted accurately? Do they report what actually happened? Are they inspired? How should they be interpreted?
These are related but distinct. A text can be accurately copied without being historically true, and historically informative without being inspired. Clarity here prevents both naïve trust and dismissive skepticism.
The chain of transmission
We do not possess the original manuscripts. What we have are copies — thousands of them, in Greek and other languages, dating from the second century onward.
Two observations matter. First, the quantity and earliness of New Testament manuscripts is unusually strong compared with most ancient texts. Second, the variations among them are mostly minor — spelling, word order — and no central Christian claim rests on a disputed reading.
This does not prove the texts are true. It does show that we can know, with high confidence, what the authors wrote.
Dating and authorship
Most of the New Testament was written within the first century, within a generation or two of the events. The letters of Paul, which contain early creedal material, date to within twenty years of the crucifixion.
This matters because the time between event and written record is short enough that the accounts could be checked against living witnesses — and, where they were not, challenged.
Genre and honesty
The Gospels are not modern biography, but neither are they free-floating legend. They bear marks of rootedness in named places, people, and time. They also preserve details that would have been embarrassing to the early church — the disciples' failures, women as first witnesses — which suggests they were not simply shaped to serve a polished message.
A reasonable trust
To trust the New Testament documents is not to suspend criticism. It is to recognize that, by the standards we apply to other ancient texts, they hold up well. What they claim about Jesus deserves to be read carefully, not dismissed as legend by default.