The Bible: Do NT verses on Scripture apply to both Testaments?

This post is part of a series investigating the most important items of Christian doctrine. View all posts by clicking here or the DOGMA tag above.

Can we generalize New Testament verses on the authority of Scripture (eg. 2 Tim 3:15-17) to the NT since in the original context they were referring only to the Old Testament?

I didn’t get to answer this one on Sunday, but it’s a good question and deserves a little time. Basically, the question raises the issue that the New Testament authors use the word Scripture to refer to their Scripture which would have been the Jewish Scriptures or the Old Testament. Therefore, one could argue, the New Testament passages on Scriptural authority apply only to the Old Testament. As a result, how do we get our idea that the New Testament is also authoritative?

This is a very rational line of thought, but it misses on one small point. When the New Testament writers used the word “Scripture” they were not talking only about the Old Testament. In fact, there’s a fascinating passage in 2 Peter 3:15-16:

Bear in mind that our Lord’s patience means salvation, just as our dear brother Paul also wrote you with the wisdom that God gave him. He writes the same way in all his letters, speaking in them of these matters. His letters contain some things that are hard to understand, which ignorant and unstable people distort, as they do the other Scriptures, to their own destruction. — 2 Peter 3:15-16

What’s fascinating in this passage is that Peter considered Paul’s writings to be Scripture. The word “other” near the end of v. 16 demonstrates that. Another fascinating thing about this passage is that Paul was still alive when it was written. So follow the logic: Peter knows about Paul’s writings. Peter calls them Scripture. Paul most likely is aware of Peter’s writings. He surely would have been told what Peter thought about his letters. Paul doesn’t deny it, ever. The most likely conclusion is that Paul and Peter both knew that what was being written in their day was to be considered Scripture.

Therefore, the answer is “Yes.” New Testament passages on Scripture refer also to the other New Testament writings.