In asserting for De Quincey the leading position among the writers of this century, we are clothing him with no ordinary honors--honors which no man can rightfully enjoy without mental endowments at once multiform and transcendent. Our age thus far has been prolific in genius, inferior, indeed, to no other, except, perhaps, the Elizabethan; and, even here, inferior only at two points, tragedy and that section of poetry in which alone is found the incarnation of the sublime--the divine strains of John Milton. But in range of achievement our epoch has scarcely a rival. Mighty champions have arisen in almost every department of letters, and it is plain that, amid merits so divergent and wide removed, we can justly ascribe absolute precedence to no man without establishing, at the outset, a standard of ideal excellence, and by that adjusting the claims of all competitors.
We may remark, then, in general, that few first-class writers have appeared who did not require as a condition of success varied and profound learning. Kant, indeed, won immortality by the efforts of blank power. It is said that he never read a book; so wonderful was his synthetical and logical power, that if he could once discover the starting point, the initial principles of a writer, there was no occasion for his toiling through the intermediate argumentation to reach the conclusions--he grasped them almost intuitively, provided, of course, the deductions were logical. But even Kant, had his acquaintance with the literature of metaphysics been more extensive, would have avoided many errors, as well as the trouble of discovering many truths in which he had been long anticipated. Herder thought that too much reading had hurt the spring and elasticity of his mind. Doubtless we may carry our efforts to excess in this direction as well as any other, by calling into unduly vigorous and persistent action the merely receptive energies of the mind. Perhaps this was the case with Herder, as the range of his reading was truly immense; but if so, it argues with fatal effect against his claims to the highest order of intellect; if the weight of his body was too great for his wings, there lurked somewhere a sad defect. In the vast plurality of cases success lies in, and is graduated by, the intensity of mental reaction upon that which has been acquired from others. The achievements of the past are stepping stones to the conquests of the present. New truths, new discoveries, are old truths, old discoveries remodelled and shifted so as to meet the view under a different angle; new structures are in no proper sense creations, but mainly the product of a judicious eclecticism. Sir William Hamilton was a vast polyhistor long before he could be called a philosopher, or even thought himself one. Researches the most persistent in nearly every department of letters were with him the indispensable prelude to his subsequent triumphs.