Several peoples, however, even in Europe and its neighbourhood, have desired without success to preserve or restore the old system: but the spirit of Christianity has everywhere prevailed. The sacred cult has always remained or again become independent of the Sovereign, and there has been no necessary link between it and the body of the State. Muhammad held very sane views, and linked his political system well together; and, as long as the form of his government continued under the caliphs who succeeded him, that government was indeed one, and so far good. But the Arabs, having grown prosperous, lettered, civilised, slack and cowardly, were conquered by barbarians: the division between the two powers began again; and, although it is less apparent among the Muhammadans than among the Christians, it none the less exists, especially in the sect of Ali, and there are States, such as Persia, where it is continually making itself felt.