ectypal.net

...we must definitely distinguish between the word of God and Scripture. Not in the sense that the word of God could be found only in Scripture and was not Scripture itself; but in this other sense, that the word in most cases does not come to us at all as Scripture, that is, in the form of Scripture. In fact, it comes in such a way that, having been absorbed from Scripture into the consciousness of the church, it proceeds from there to the most diverse people in the form of admonition and speech, nurture and education, books, magazines, tracts, and speeches and exerts its effect. And always it is God who stands behind that word. It is he who causes that word to go forth to people in all those diverse forms and thereby calls them to repentance and life.