There is a still further advantage that belongs to the poet and the votarist of polite literature, which ought to be mentioned, as strongly calculated to repress the arrogance of the men of science, and the supercilious contempt they are apt to express for those who are engrossed by the pursuits of imagination and taste. They are for ever talking of the reality and progressiveness of their pursuits, and telling us that every step they take is a point gained, and gained for the latest posterity, while the poet merely suits himself to the taste of the men among whom he lives, writes up to the fashion of the day, and, as our manners turn, is sure to be swept away to the gulph of oblivion. But how does the matter really stand? It is to a great degree the very reverse of this. The natural and experimental philosopher has nothing sacred and indestructible in the language and form in which he delivers truths. New discoveries and experiments come, and his individual terms and phrases and theories perish. One race of natural philosophers does but prepare the way for another race, which is to succeed. They "blow the trumpet, and give out the play." And they must be contented to perish before the brighter knowledge, of which their efforts were but the harbingers. The Ptolemaic system gave way to Tycho Brahe, and his to that of Copernicus. The vortices of Descartes perished before the discoveries of Newton; and the philosophy of Newton already begins to grow old, and is found to have weak and decaying parts mixed with those which are immortal and divine. In the science of mind Aristotle and Plato are set aside; the depth of Malebranche, and the patient investigation of Locke have had their day; more penetrating, and concise, and lynx-eyed reasoners of our own country have succeeded; the German metaphysicians seem to have thrust these aside; and it perhaps needs no great degree of sagacity to foresee, that Kant and Fichte will at last fare no better than those that went before them.