Yet the severed limbs of the Empire forgot by degrees their original unity. As in the breaking up of the old society, which we trace from the sixth to the eighth century, rudeness and ignorance grew apace, as language and manners were changed by the infiltration of Teutonic settlers, as men's thoughts and hopes and interests were narrowed by isolation from their fellows, as the organization of the Roman province and the Germanic tribe alike dissolved into a chaos whence the new order began to shape itself, dimly and doubtfully as yet, the memory of the old Empire, its symmetry, its sway, its civilization, must needs wane and fade. It might have perished altogether but for the two enduring witnesses Rome had left--her Church and her Law. The barbarians had at first associated Christianity with the Romans from whom they learned it: the Romans had used it as their only bulwark against oppression. The hierarchy were the natural leaders of the people, and the necessary councillors of the king. Their power grew with the extinction of civil government and the spread of superstition; and when the Frank found it too valuable to be abandoned to the vanquished people, he insensibly acquired the feelings and policy of the order he entered. [Sidenote: Jurisprudence.] As the Empire fell to pieces, and the new kingdoms which the conquerors had founded themselves began to dissolve, the Church clung more closely to her unity of faith and discipline, the common bond of all Christian men. That unity must have a centre, that centre was Rome. A succession of able and zealous pontiffs extended her influence (the sanctity and the writings of Gregory the Great were famous through all the West): never occupied by barbarians, she retained her peculiar character and customs, and laid the foundations of a power over men's souls more durable than that which she had lost over their bodies[37]. Only second in importance to this influence was that which was exercised by the permanence of the old law, and of its creature the municipality. The barbarian invaders retained the customs of their ancestors, characteristic memorials of a rude people, as we see them in the Salic law or in the ordinances of Ina and Alfred. But the subject population and the clergy continued to be governed by that elaborate system which the genius and labour of many generations had raised to be the most lasting monument of Roman greatness.