"Religion like any other ideology can be attained only by propaganda. If propaganda fails, religion must disappear. The priestly class, however detestable it may be, is necessary to the sustenance of religion. For it is by its propaganda that religion is kept up. Without the priestly class religion must disappear. The sword of Islam fell heavily upon the priestly class. It perished or it fled outside India. Nobody remained to keep the flame of Buddhism burning. It may be said that the same thing must have happened to the Brahmanical priesthood. It is possible, though not to the same extent. But there is this difference between the constitution of the two religions and the difference is so great that it contains the whole reason why Brahmanism survived the attack of Islam and why Buddhism did not. This difference relates to the constitution of the clergy. The Brahmin priesthood has a most elaborate organization. Every Brahmin is a potential priest of Brahmanism and be drafted in service when the need be. There is nothing to stop the rake’s life and progress. This is not possible in Buddhism. A person must be ordained in accordance with established rites by priests already ordained, before he can act as a priest. After the massacre of the Buddhist priests, ordination became impossible so that the priesthood almost ceased to exist. Some attempt was made to fill the depleted ranks of the Buddhist priests. New recruits for the priesthood had to be drawn from all available sources. They certainly were not the best."