And if the interposition of the Church is necessary in the Schools of Science, still more imperatively is it demanded in the other main constituent portion of the subject-matter of Liberal Education,—Literature. Literature stands related to Man as Science stands to Nature; it is his history. Man is composed of body and soul; he thinks and he acts; he has appetites, passions, affections, motives, designs; he has within him the lifelong struggle of duty with inclination; he has an intellect fertile and capacious; he is formed for society, and society multiplies and diversifies in endless combinations his personal characteristics, moral and intellectual. All this constitutes his life; of all this Literature is the expression; so that Literature is to man in some sort what autobiography is to the individual; it is his Life and Remains. Moreover, he is this sentient, intelligent, creative, and operative being, quite independent of any extraordinary aid from Heaven, or any definite religious belief; and as such, as he is in himself, does Literature represent him; it is the Life and Remains of the natural man, innocent or guilty. I do not mean to say that it is impossible in its very notion that Literature should be tinctured by a religious spirit; Hebrew Literature, as far as it can be called Literature, certainly is simply theological, and has a character imprinted on it which is above nature; but I am speaking of what is to be expected without any extraordinary dispensation; and I say that, in matter of fact, as Science is the reflection of Nature, so is Literature also—the one, of Nature physical, the other, of Nature moral and social. Circumstances, such as locality, period, language, seem to make little or no difference in the character of Literature, as such; on the whole, all Literatures are one; they are the voices of the natural man.
I wish this were all that had to be said to the disadvantage of Literature; but while Nature physical remains fixed in its laws, Nature moral and social has a will of its own, is self-governed, and never remains any long while in that state from which it started into action. Man will never continue in a mere state of innocence; he is sure to sin, and his literature will be the expression of his sin, and this whether he be heathen or Christian. Christianity has thrown gleams of light on him and his literature; but as it has not converted him, but only certain choice specimens of him, so it has not changed the characters of his mind or of his history; his literature is either what it was, or worse than what it was, in proportion as there has been an abuse of knowledge granted and a rejection of truth. On the whole, then, I think it will be found, and ever found, as a matter of course, that Literature, as such, no matter of what nation, is the science or history, partly and at best of the natural man, partly of man in rebellion.You can read the entire discourse here