man of business, the accomplished citizen. And it is to this walking out into the realm of common life, instead of confining himself like so many erudite Germans within the limits of a library or a laboratory, that Aristotle owes no small part of the influence which he has so long exercised, not only in the schools but among intelligent men of all classes. In ancient times, when Moral Philosophy was justly regarded as the principal part of that wisdom which it concerns all men to possess, the Philosopher of the Lyceum never would have been able to assert his place as a public teacher alongside of Socrates and Plato had he bestowed only a secondary consideration on the grand arts of living and governing. As it was, the poet-philosopher of the Academy could not but remain {129} the more popular and the more effective moral teacher of the two; but if Plato was more attractive and more interesting, and by these qualities commanded a wider audience, it was a great consolation to the lesser circle of the Stagirite’s disciples that, though in his discourses on moral matters he was more angular and more severe, he was at the same time more shrewd, more sagacious, and more practical. The reputation which Aristotle thus maintained among ancient Greeks and Romans, both as a speculator and as a wise guide in the conduct of life, was increased rather than diminished when brought into contact with the new moral force of Christianity. No doubt Plato at first was the natural vestibule through which the cultivated Greeks of Alexandria entered the temple of Christian faith; but after that faith, partly in league with Plato, and partly in spite of Plato, had achieved its natural triumph, Aristotle, the clear, cold, and keen, but by no means devout master of all knowledge, by a sort of reaction, as it should seem, in the middle ages began to assert an exclusive dominance in the schools, both of Christian Europe and, through the Arabians, in the East. To all who were anxious for clear and exact knowledge in matters visible and tangible, the Stagirite was the only guide. As the high priest of science he acted in those days of sacerdotal direction as the natural complement of faith, not as its antagonist; and for this reason he is praised by Dante among the solemn forms of the mighty dead that pace through the dim halls of the unseen world, as “Il gran maestro di color chi sanno.”