The _fourth_, or highest, implying entire union with the Divine essence, is held by Schamyl alone. In virtue of this elevation and spiritual endowment, the Imam, as an immediate organ of the Supreme Will, is himself the source of all law to his followers, unerring, impeccable; to question or disobey his behests is a sin against religion, as well as a political crime. It may be seen what advantage this system must have given to Schamyl in his conflict with the Russians. The doctrine of the indifference of sects and forms enabled him to unite the divided followers of Omar and of Ali, in a region where both abound, and where the schism had formerly been one of the most effectual instruments of the enemy. The belief in a Divine mission and spiritual powers sustains his adherents in all reverses; while it invites to defection from the Russian side those of the Mohammedan tribes who have submitted to the invader. Among these, however, Schamyl, like his predecessors in the same priestly office, by no means confides the progress of his sect to spiritual influences only. The work of conversion, where exhortation fails, is carried on remorselessly by fire and sword; and the Imam is as terrible to those of his countrymen whom fear or interest retains in alliance with Russia, as to the soldiers of the Czar. With a character in which extreme daring is allied with coolness, cunning, and military genius, with a good fortune which has hitherto preserved his life in many circumstances where escape seemed impossible,--it may be seen that the belief in his supernatural gifts and privileges, once created, must always tend to increase in intensity and effect among the imaginative and credulous Mohammedans of the Caucasus; and that this apt combination of the warrior with the politician and prophet accounts for his success in combining against the Russians a force of the once discordant tribes of Daghestan, possessing more of the character of a national resistance than had been ever known before in the Caucasus,--and compelling the invaders to purchase every one of their few, trifling, and dubious advances by the terrible sacrifice of life already noticed.