Question: what is dei verbum and why was it written

title: Dei verbum
text: Footnote : In and by man : cf . Heb. 1 : 1 ; 4 : 7 ( in ) ; 2 Sam 23 : 2 ; Mt 1 : 22 and passim ( by ) ; Vatican Council I , schema de doctr . cath. , note 9 ; Coll . Lac. , VII , 522 .