Augustine on Scripture

"Consider, moreover, the style in which Sacred Scripture is composed,—how accessible it is to all men, though its deeper mysteries are penetrable to very few. The plain truths which it contains it declares in the artless language of familiar friendship to the hearts both of the unlearned and of the learned; but even the truths which it veils in symbols it does not set forth in stiff and stately sentences, which a mind somewhat sluggish and uneducated might shrink from approaching, as a poor man shrinks from the presence of the rich; but, by the condescension of its style, it invites all not only to be fed with the truth which is plain, but also to be exercised by the truth which is concealed, having both in its simple and in its obscure portions the same truth. Lest what is easily understood should beget satiety in the reader, the same truth being in another place more obscurely expressed becomes again desired, and, being desired, is somehow invested with a new attractiveness, and thus is received with pleasure into the heart. By these means wayward minds are corrected, weak minds are nourished, and strong minds are filled with pleasure, in such a way as is profitable to all. This doctrine has no enemy but the man who, being in error, is ignorant of its incomparable usefulness, or, being spiritually diseased, is averse to its healing power."

-Augustine, Letter to Volusianus 5.18