How do we know the Bible wasn't changed over time?

The New Testament survives in thousands of manuscripts, some very early, plus early translations and quotations. Comparing them shows the differences are overwhelmingly minor spelling and wording; no core teaching is in doubt, so we can reconstruct the original text with confidence.

Does archaeology support the Bible?

Repeatedly. Rulers, cities, and customs mentioned in Scripture have been confirmed by archaeology and independent histories. This does not prove every theological claim, but it shows the Bible is anchored in real history, not myth.

Is the Bible reliable?

Q: Is the Bible reliable?

By ordinary historical tests, yes. Its texts are preserved in more and earlier manuscripts than any other ancient writing, so we know what was originally written, and its named people, places, and customs are repeatedly confirmed by archaeology. It also preserves unflattering details that inventors avoid (Isaiah 40:8).

The short answer

By the ordinary tests historians use, the Bible is remarkably reliable. Its texts are preserved in far more, and far earlier, manuscripts than any other ancient writing, so we can know with confidence what was originally written. Its accounts include named people, places, and customs repeatedly confirmed by archaeology, and it preserves details no inventor would choose. It is not a single book but a library, honest about the flaws of its own heroes.

Reliability has two parts: has the text reached us intact, and is what it reports trustworthy. On both, the Bible does unusually well.

The text has reached us intact

The New Testament survives in thousands of Greek manuscripts, some within a generation or two of the events, alongside early translations and quotations. No other ancient work comes close to this richness. The differences among copies are overwhelmingly tiny matters of spelling and word order; no core teaching hangs in doubt. We can be confident we are reading what was written.

The reports ring true

The Bible names real rulers, cities, and customs that archaeology and other histories keep confirming. It also does something inventors avoid: it records the failures, doubts, and cowardice of its own leading figures, and lets women be the first witnesses of the resurrection in a culture that undervalued their testimony. Legends flatter; this reads like memory.

“The grass withereth, the flower fadeth: but the word of our God shall stand for ever.”
Isaiah 40:8

It comes back to Jesus

Reliability matters because of where it leads. The same records that historians can trust are the ones that show us Jesus, his words, his cross, and his empty tomb. You can open the Bible expecting neither a fairy tale nor a textbook, but a trustworthy witness to the God who came to find us.

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Related question: Has the Bible been changed?
Related question: Can you trust the Gospels?