Whoever, therefore, thinks that he understands the divine scriptures or any part of them so that it does not build on the double love of God and of our neighbor does not understand it at all. Thus a man supported by faith, hope, and charity, with an unshaken hold upon them does not need the scriptures... And many live by these three things in solitude without books.

On Christian doctrine (ed. MacMillan Publishing Company, 1958)