The Early Christians Had the Old Testament

The early Christians had in their hands what was a Bible to them, namely, the Old Testament Scriptures. These were used to a surprising extent in Christian instruction. For a whole century after the death of Jesus this was the case. These Scriptures were read in the churches, and there could be at first no idea of placing beside them new books which could for a moment rank with them in honor and authority. It has been once and again discussed whether Christianity from the first was a “book-religion.” The decision of the matter depends upon what is referred to by the word “book.” Christianity certainly did have from the very beginning a book which it reverenced - the Old Testament - but years passed before it had even the beginnings of a book of its own. What has been called “the wealth of living canonical material,” namely, prophets and teachers, made written words of subordinate value. In this very teaching, however, with its oral traditions lay the beginnings of that movement which was ultimately to issue in a canon of writings.

From the International Standard Bible Encyclopedia
Edited by James Orr, published in 1939 by Wm. B. Eerdmans Publishing Co