The antique civilization of the Roman Empire was followed by that depression of decadence and barbarization which separates antiquity from the Middle Ages. Out of the confusion of this intervening period emerged the mediaeval peoples of western Europe. These, as knowledge increased with them, began to manifest spiritual traits having no clear counterpart in the ancient sources from which they drew the matter of their thought and contemplation. The past which furnished the content of mediaeval thought was twofold, very dual, even carrying within itself the elements of irreconcilable conflict; and yet with its opposing fronts seemingly confederated, if not made into one. Sprung from such warring elements, fashioned by all the interests of life in heaven as well as life on earth, the traits and faculties of mediaeval humanity were to make a motley company. Clearly each mediaeval century will offer a manifold of disparity and irrelationship, not to be brought to unity, any more than can be followed to the breast of one mighty wind-god the blasts that blow from every quarter over the waters of our own time. Nevertheless, each mediaeval century, and if one will, the entire Middle Ages, seen in distant perspective, presents a consistent picture, in which dominant mediaeval traits, retaining their due pre-eminence, may afford a just conception of the mediaeval genius.[1] I While complex in themselves, and intricate in their interaction, the elements that were to form the spiritual constituency of the Middle Ages of western Europe may be disentangled and regarded separately. There was first the element of the antique, which was descended from the thought and knowledge current in Italy and the western provinces of the Roman Empire, where Latin was the common language. In those Roman times, this fund of thought and knowledge consisted of Greek metaphysics, physical science, and ethics, and also of much that the Latins had themselves evolved, especially in private law and political institutions.