Can Evangelicals conceive of teaching and believing in Jesus without the Bible? How is the history of Evangelical theology taught? If the bible did not exist for hundreds of years after Christ’s death, then how do Evangelicals explain how early Christians knew of the total teachings of Jesus Christ without the Bible?
The Catholic Church started without the Bible. Sacred scripture (the Bible) became part or our sacred tradition. The logic is simple and the truth follows (or maybe visa versa).
What this doesn’t explain, is how Catholics propose to find quotations from the deuterocanonical books in the (allegedly non-existent) New Testament.
Most people would find it difficult to find references to books, in books that did not exist.
What did Jesus quote in Matthew & Luke 4 ? The OT. That existed in His time. The Fathers very often quoted from the Scriptures - their quotations are an important source of information for variant textual readings in both Testaments. Isn’t Romans 15.4 in Catholic Bibles ? Of course it is:
Rom 15:1 We who are strong ought to bear with the failings of the weak, and not to please ourselves;
Rom 15:2 let each of us please his neighbor for his good, to edify him.
Rom 15:3 For Christ did not please himself; but, as it is written, “The reproaches of those who reproached thee fell on me.”
Rom 15:4 For
whatever was written in former days was written for our instruction, that by steadfastness and by the encouragement of the scriptures we might have hope.
It is simply untrue to say there was no Bible until the formal canonisation of the 27-book canon of the NT; that was the final step in a long process of selection, recognition, debate, discussion, disagreement. It does not exactly increase confidence in the excellence of Tradition, that different Fathers & Churches differed over the canonicity of various books. The lack of a 27-book canon =/= the lack of 27 books already recognised in much or all of the Church to be inspired. The Church cannot confer inspiration - she can only recognise & acknowledge it (This BTW is Catholic doctrine) .
To answer your question:
How did people know before the Bible was canonised what Christ taught ? Tradition, as passages in Paul suggest - but that is no reason for having tradition later on, because all the tradition God wished us to accept as authoritative, is now in the Bible.
The messages of the prophets, at the least - leaving other parts of the Bible out of the question for the moment - were authoritative: Jeremiah 36 did not have to wait to be edited, recognised as “defiling the hands”, or as canonical, to be the word of the LORD to an unrighteous king of Judah; it was the word of God from the instant that the prophet received it. It was pronounced to the king because it was already a Divine word, with God’s own authority. The Church had absolutely nothing to do with its authority - except to recognise it for what it is: the word of of God, which has divine power to cast down strongholds, and to take every thought captive for Jesus Christ.
Men do not judge the word of God - the word of God judges us.
Even more important than tradition, is the guidance of the Holy Spirit, without whom all else in the Church would be utterly useless, even dangerous. So the Holy Spirit guided the Church to select what He had inspired, & only that, to be formally canonised. And what the Church has selected, is given to the Church to be the supreme judge of all controversies in faith. Tradition had to “decrease, that” Scripture “might increase” - just as John the Baptist “did himself out of a job”, precisely by being faithful to his calling, so tradition has “done itself out of a job”, by doing the work in the Church for which it was intended.
Whatever the extent of the canon acknowledged by each NT writer, there was definitely
something to refer to. Jude may have regarded 1 Enoch as Scripture, & may or may not have been alone in this (some of the earlier Fathers regarded the Book of Jubilees as Scripture); whatever the uncertainties, nothing can alter the fact that there were
oracles of God to refer to; as is clear from Philo, Josephus, & many others, as well as St.Paul & the rest of the NT, & the Fathers. ##