That the Church is the interpreter of the Scriptures:
“To him that believes, all will be plain, if he read diligently the Scripture with the aid of those who are the priests in the Church, and in whose hands, as we have shown rests the doctrine of the Apostles.”  –  St Irenaeus,  Adv. Heres. 1.iv.c.52

“Those who are out of the Church cannot have any understanding of the Divine Word…they all quote Scripture, but without the sense of Scripture.” Hilary of Poitier, In Matthaum xiii.1

“To attain to the truth of the Scriptures, we must follow the sense of them as entertained by the Universal Church, to which the Scriptures themselves bear testimony.”  St Augustine of Hippo, Contra Crescon, 1.i.c.33