Samuel Davidson,
The Canon of the Bible
“ Justin's canon, as far as divine authority and inspiration are concerned, was the Old Testament. He was merely on the threshold of a divine canon made up of primitive Christian writings, and attributed no exclusive sanctity to those he used because they were not to him the only source of doctrine. Even of the Apocalypse he says, “A man among us named John, &c., wrote it.”170 In his time none of the gospels had been canonized, not even the synoptists, if, indeed, he knew them all. Oral tradition was the chief fountain of Christian knowledge, as it had been for a century. ”

