Augustine said, “You ought to notice particularly and store in your memory that God wanted to lay a firm foundation in the Scriptures against treacherous errors, a foundation against which no one dares to speak who would in any way be considered a Christian. For when He offered Himself to them to touch, this did not suffice Him unless He also confirmed the heart of the believers from the Scriptures, for He foresaw that the time would come when we would not have anything to touch but would have something to read” (In Epistolam Johannis tractus, 2).

Let those things be removed from our midst which we quote against each other not from divine canonical books but from elsewhere. Someone may perhaps ask: Why do you want to remove these things from the midst? Because I do not want the holy church proved by human documents but by divine oracles (Augustine, De unitate ecclesiae 3).

Whatever they may adduce, and wherever they may quote from, let us rather, if we are His sheep, hear the voice of our Shepherd. Therefore let us search for the church in the sacred canonical Scriptures (Augustine, De unitate ecclesiae 3).

Gregory of Nyssa (c. 335-95): “..we make the Holy Scriptures the canon and the rule of every dogma; we of necessity look upon that, and receive alone that which may be made conformable to the intention of those writings. (On the Soul and Resurrection).

Rome anathematized anyone who would say you could be saved apart from grace. Anyone who has the slightest knowledge of Rome knows that. The issue then, and today, is not the necessity of grace, it is the sufficiency of grace!

Basil of Caesarea:

The hearers taught in the Scriptures ought to test what is said by teachers and accept that which agrees with the Scriptures but reject that which is foreign. (Moralia, 72:1)

Cyril of Jerusalem:

In regard to the divine and holy mysteries of the faith, not the least part may be handed on without the Holy Scriptures. Do not be led astray by winning words and clever arguments. Even to me, who tell you these things, do not give ready belief, unless you receive from the Holy Scriptures the proof of the things which I announce. The salvation in which we believe is not proved from clever reasoning, but from the Holy Scriptures. (Catechetical Lectures 4:17)