upon two principles, which are found in the Book itself. The first being that the existence of the class of men called prophets and apostles is well-known. They are the men who lay down laws for the people by divine revelation, and not by human education. Their existence can be denied only by the people who deny repeated action, as the existence of all things which we have not seen—the lives of the famous thinkers and so forth. All the philosophers, and other men are agreed, except those who pay no regard to their words, (and they are the Materialists), that there are men to whom have been revealed many commandments for the people, to perform certain good actions, by which their beatitude may be perfected; and to make them give up certain wrong beliefs and vicious actions. This is the business of divine apostles. The second principle is, that everyone who does this work, that is, lays down laws by revelation, is a prophet. This principle is also quite in accordance with human nature. For as it is
