Of course, this criticism, so hostile to the current cant of the moment, was endlessly misinterpreted and misunderstood. He thus explained his doctrine in a Preface to a Second Edition of his Poems: "It has been said that I wish to limit the poet, in his choice of subjects, to the period of Greek and Roman antiquity; but it is not so. I only counsel him to choose for his subjects great actions, without regarding to what time they belong." A few years later he wrote to a friend (in a letter hitherto unpublished): "The modern world is the widest and richest material ever offered to the artist; but the moulding and representing power of the artist is not, or has not yet become (in my opinion), commensurate with his material, his _mundus representandus_. This adequacy of the artist to his world, this command of the latter by him, seems to me to be what constitutes a first-class poetic epoch, and to distinguish it from such an epoch as our own; in this sense, the Homeric and Elizabethan poetry seems to me of a superior class to ours, though the world represented by it was far less full and significant." There is no need to describe in greater detail the two Prefaces, which can be read, among rather incongruous surroundings, in the volume called _Irish Essays, and Others_. But they are worth noting, because in them, at the age of thirty, he first displayed the peculiar temper in literary criticism which so conspicuously marked him to the end; and that temper happily infected the critical writing of a whole generation; until the Iron Age returned, and the bludgeon was taken down from its shelf, and the scalping-knife refurbished. In his critical temper, lucidity, courage, and serenity were equally blended. In his criticism of books, as in his criticism of life, he aimed first at Lucidity--at that clear light, uncoloured by prepossession, which should enable him to see things as they really are. In a word, he judged for himself; and, however much his judgment might run counter to prejudice or tradition, he dared to enounce it and persist in it. He spoke with proper contempt of the "tenth-rate critics, for whom any violent shock to the public taste would be a temerity not to be risked"; but that temerity he himself had in rich abundance. Homer and Sophocles are the only poets of whom, if my memory serves me, he never wrote a disparaging word. Shakespeare is, and rightly, an object of national worship; yet Arnold ventured to point out his "over-curiousness of expression"; and, where he writes-- Till that Bellona's bridegroom, lapped in proof, Confronted him with self-comparisons, Arnold dared to say that the writing was "detestable."