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. But all this is simply conditional. What, then, are the powers which nature alone can bestow? What must she have done before the highest results can arise from literary effort, however immense the compass of our information? There must be powerful analytic and discursive ability, combined with a commensurate reach of constructive and imaginative capacity. An intellect thus endowed, approaches the perfection of our ideal. If one of these elements is deficient, we shall lack either depth or brilliance, acuteness or fancy; our structures may be massive, titanic, but hostile to the laws of a refined taste; colossal and dazzling, but too airy and unsubstantial except for the few who are 'With reason mad, and on phantoms fed.' Before some such ideal tribunal as this let us summon the aspirants to the dictatorial honors which seem to have slumbered since the day of Dr. Johnson, and arbitrate their claims.