"The greatest harm." Come tell me, do all things which seem to some persons to be good and becoming rightly appear such; and at present as to Jews and Syrians and Egyptians and Romans, is it possible that the opinions of all of them in respect to food are right? "How is it possible?" he said. Well, I suppose it is absolutely necessary that, if the opinions of the Egyptians are right, the opinions of the rest must be wrong: if the opinions of the Jews are right, those of the rest cannot be right. "Certainly." But where there is ignorance, there also there is want of learning and training in things which are necessary.