(20) Accordingly such food, in order to clear understanding, is to be rejected. Wherefore also the Egyptians, in the purifications practised among them, do not allow the priests to feed on flesh; but they use chickens, as lightest; and they do not touch fish, on account of certain fables, but especially on account of such food making the flesh flabby. But now terrestrial animals and birds breathe the same air as our vital spirits, being possessed of a vital principle cognate with the air. But it is said that fishes do not breathe this air, but that which was mixed with the water at the instant of its first creation, as well as with the rest of the elements, which is also a sign of the permanence of matter.

(4) Similarly, repressing our desires, it forbade partaking of fishes which have neither fins nor scales; for these surpass other fishes in fleshiness and fatness. From-this it was, in my opinion, that the mysteries not only prohibited touching certain animals, but also withdrew certain parts of those slain in sacrifice, for reasons which are known to the initiated. If, then, we are to exercise control over the belly, and what is below the belly, it is clear that we have of old heard from the Lord that we are to check lust by the law.

(24) He knows also the enigmas of the fasting of those days - I mean the Fourth and the Preparation. For the one has its name from Hermes, and the other from Aphrodite. He fasts in his life, in respect of covetousness and voluptuousness, from which all the vices grow. For we have already often above shown the three varieties of fornication, according to the apostle - love of pleasure, love of money, idolatry. He fasts, then, according to the Law, abstaining from bad deeds, and, according to the perfection of the Gospel, from evil thoughts.