The Fathers quoted Scripture constantly. Bruce Metzger notes: “so extensive are these citations that if all other sources for our knowledge of the text of the New Testament were destroyed, they would be sufficient alone for the reconstruction of practically the entire New Testament.”
We might criticize some of the father for this or that doctrinal oddity, but we should respect their deep knowledge, and reverance for, the Scriptures.
 Meztger, The Text of the New Testament, 3rd ed., 86, qtd. in Lightfoot, How We Got the Bible, 106.