The schema, or draft document, prepared for the first council session (October–December 1962) reflected the conservative theology of the
Holy Office, led by Cardinal
Alfredo Ottaviani. Pope John intervened directly to promote instead the preparation of a new draft which was assigned to a mixed commission of conservatives and progressives, and it was this on which the final document was based. Wording in the first draft, which alluded to the several or "double" sources of revelation, was removed the final document, where the term "divine revelation" points to revelation having only one "source". For his contributions to
Dei Verbum and many other parts of Vatican II,
Pope Paul VI called it "Newman's Council". Dennis Hamm has also identified
Pope Leo XIII's encyclical letter
Providentissimus Deus,
Pius XII's
Divino Afflante Spiritu, and a document issued shortly before the Council by the
Pontifical Biblical Commission,
Sancta Mater Ecclesia: An instruction on the Truth of the Gospels (21 April 1964) as other doctrinal writings which had "contributed conspicuously" to the formation of the ideas expressed in the constitution.
Joseph Ratzinger identified three overall themes in
Dei verbum: • the new view of the phenomenon of tradition; • the theological problem of the application of critical historical methods to the interpretation of Scripture; and • the biblical movement that had been growing from the turn of the twentieth century. Regarding article 1 of the preface of
Dei verbum, Ratzinger wrote: "The brief form of the Preface and the barely concealed illogicalities that it contains betray clearly the confusion from which it has emerged." ==Biblical infallibility and inerrancy==