Regarded from this point of view, as substances to be digested, the poetic remains of Lucretius, Dante, and Goethe (though it is his _Faust_ only that I shall speak of) afford rather a varied feast. In their doctrine and genius they may seem to be too much opposed to be at all convergent or combinable in their wisdom. Some, who know and care for one, perhaps, of these poets, may be disposed to doubt whether they have anything vital to learn from the other two. Yet it is as a pupil--I hope a discriminating pupil--of each in turn that I mean to speak; and I venture to maintain that in what makes them great they are compatible; that without any vagueness or doubleness in one’s criterion of taste one may admire enthusiastically the poetry of each in turn; and that one may accept the essential philosophy, the positive intuition, of each, without lack of definition or system in one’s own thinking. Indeed, the diversity of these three poets passes, if I may use the Hegelian dialect, into a unity of a higher kind. Each is typical of an age. Taken together they sum up all European philosophy. Lucretius adopts the most radical and the most correct of those cosmological systems which the genius of early Greece had devised. He sees the world to be one great edifice, one great machine, all its parts reacting upon one another, and growing out of one another in obedience to a general pervasive process or life. His poem describes the nature, that is, the birth and composition, of all things. It shows how they are compounded out of elements, and how these elements, which he thinks are atoms in perpetual motion, are being constantly redistributed, so that old things perish and new things arise. Into this view of the world he fits a view of human life as it ought to be led under such conditions. His materialism is completed by an aspiration towards freedom and quietness of spirit. Allowed to look once upon the wonderful spectacle, which is to repeat itself in the world for ever, we should look and admire, for to-morrow we die; we should eat, drink, and be merry, but moderately and with much art, lest we die miserably, and die to-day. This is one complete system of philosophy,--materialism in natural science, humanism in ethics. Such was the gist of all Greek philosophy before Socrates, of that philosophy which was truly Hellenic and corresponded with the movement which produced Greek manners, Greek government, and Greek art--a movement towards simplicity, autonomy, and reasonableness in everything, from dress to religion. Such is the gist also of what may be called the philosophy of the Renaissance, the reassertion of science and liberty in the modern world, by Bacon, by Spinoza, by the whole contemporary school that looks to science for its view of the facts, and to the happiness of men on earth for its ideal. This system is called naturalism; and of this Lucretius is the unrivalled poet.