It is a just remark that had been made by Hume(5): "Theories of abstract philosophy, systems of profound theology, have prevailed during one age. In a successive period these have been universally exploded; their absurdity has been detected; other theories and systems have supplied their place, which again gave way to their successors; and nothing has been experienced more liable to the revolutions of chance and fashion than these pretended decisions of science. The case is not the same with the beauties of eloquence and poetry. Just expressions of passion and nature are sure, after a little time, to gain public applause, which they maintain for ever. Aristotle and Plato and Epicurus and Descartes may successively yield to each other: but Terence and Virgil maintain an universal, undisputed empire over the minds of men. The abstract philosophy of Cicero has lost its credit: the vehemence of his oratory is still the object of our admiration." (5) Essays, Part 1, Essay xxiii. A few examples of the instability of fame will place this question in the clearest light. Nicholas Peiresk was born in the year 1580. His progress in knowledge was so various and unprecedented, that, from the time that he was twenty-one years of age, he was universally considered as holding the helm of learning in his hand, and guiding the commonwealth of letters. He died at the age of fifty-seven. The academy of the Humoristi at Rome paid the most extraordinary honours to his memory; many of the cardinals assisted at his funeral oration; and a collection of verses in his praise was published in more than forty languages. Salmasius was regarded as a prodigy of learning; and various princes and powers entered into a competition who should be so fortunate as to secure his residence in their states. Christina, queen of Sweden, having obtained the preference, received him with singular reverence and attention; and, Salmasius being taken ill at Stockholm, and confined to his bed, the queen persisted with her own hand to prepare his caudles, and mend his fire. Yet, but for the accident of his having had Milton for his adversary, his name would now be as little remembered, even by the generality of the learned, as that of Peiresk. Du Bartas, in the reign of Henry the Fourth of France, was one of the most successful poets that ever existed. His poem on the Creation of the World went through upwards of thirty editions in the course of five or six years, was translated into most European languages, and its commentators promised to equal in copiousness and number the commentators on Homer.