📕 The four books of St. Augustin On Christian Doctrine (De Doctrina Christiana, iv libri) are a compend of exegetical theology to guide the reader in the understanding and interpretation of the Sacred Scriptures, according to the analogy of faith. The first three books were written a.d.397; the fourth was added 426. He speaks of it in his Retractations, Bk. ii., chap. 4, as follows: “Finding that the books on Christian Doctrine were not finished, I thought it better to complete them before passing on to the revision of others. Accordingly, I completed the third book, which had been written as far as the place where a quotation is made from the Gospel about the woman who took leaven and hid it in three measures of meal till the whole was leavened. I added also the last book, and finished the whole work in four books [in the year 426]: the first three affording aids to the interpretation of Scripture, the last giving directions as to the mode of making known our interpretation. In the second book, I made a mistake as to the authorship of the book commonly called the Wisdom of Solomon. For I have since learnt that it is not a well-established fact, as I said it was, that Jesus the son of Sirach, who wrote the book of Ecclesiasticus, wrote this book also: on the contrary, I have ascertained that it is altogether more probable that he was not the author of this book. Again, when I said, ‘The authority of the Old Testament is contained within the limits of these forty-four books,’ I ...