I disagree.
2 Timothy 4:13 The cloke that I left at Troas with Carpus, when thou comest, bring with thee, and the books, but especially the parchments.
is just one example of written books and parchments pertaining to the Word of God. Many other times is it written about the Bible. It always has been complete. If I lived 3000 years ago, it would have said enough to be accounted for, for righteousness sake, however it would have been interpreted differently according to the context and times. Parables were still spoken, the same lessons were taught, there was nothing that was left out. But grace and salvation is not according to the law, but by Jesus Christ. The prophets of old knew it, and wrote of him. When he came, it was fulfilled. So no one ever lacked in access to Scriptures that was necessary to lead to Christ; the bread they needed, because we live by every word that proceeds out of the mouth of God, not bread alone. So if it wasn't written by a man's hand yet, it was because it wasn't necessary yet. Otherwise, how is it that Enoch walked with God? or Elijah? seeing as they did not have "our bible"?
Genesis 15:6 And he believed in the LORD; and he counted it to him for righteousness.
2 Timothy 3:16 All scripture is given by inspiration of God, and is profitable for doctrine, for reproof, for correction, for instruction in righteousness:
And the funny thing is, Jesus quoted the Old Testament EXTENSIVELY.
first generation didn't have our bible.....pfft.