When we have been reading some transcendent passage in one of the world's masterpieces we experience that mental sensation which Longinus declares to be the test of true sublimity, to wit, our mind "undergoes a kind of proud elation and delight, as if it had itself begotten the thing we read." We are disposed by such literature very much as we are disposed by the Sistine Madonna or before the Aphrodite of Melos. Things like these exert a sort of overmastering power upon us. Our craving for perfection, for ideal beauty, is for once wholly gratified. Our spirit glows with an intense and complete satisfaction. It would build itself a tabernacle on the spot, for it recognizes that it is good to be there. We do not analyse, we do not criticize, we simply deliver over our souls to a proud elation and delight. Nay, at the moment when we are in the midst of such spontaneous and exquisite enjoyment, we should, in all likelihood, resent any attempt to make us realize exactly _why_ this particular creation of art so fills up our souls down to the last cranny of satisfaction while another stops short of that supreme effect. And yet, afterwards, when we are meditating upon this strange potency of a poem or a building or a statue, or when we are trying to communicate to others the feeling of its charm, do we not find ourselves importunately asking wherein lies the secret of great art? And, in the case of literature, we think it at such times no desecration of our delight to put a passage of Shakespeare or of Milton beside a passage of Homer, of AEschylus, or of Dante, an essay of Lamb beside a chapter of Heine, a lyric of Burns by one of Shelley, and to seek for some common measure of their excellence. Suppose that, in these more reflective moments, we can come near to some explanation; suppose we can realize what it is that these supreme writers alone achieve; then, when we read again, the very perfection of their achievement springs forward and comes home to us with a still keener delight. We feel all we felt before, but we enjoy it more, because we understand in some degree why we feel it. Say what we will, we are never really content with an admiration which cannot render to itself a reason. What are all the thousand works of literary criticism called forth by, unless it be by that perpetual question which nags for an answer in all intelligent minds, the question "What is the gift which, behind all mere diction, behind all cadence and rhythm and rhyme, behind all mere lucidity, behind all mere intellect, and behind all variety of subject matter, makes writing everlastingly fresh, admirable, a thing of beauty and a joy for ever"?