(12) Why does he order seven of each of the clean animals, male and female, to be taken into the ark, but of the unclean animals only two, male and female, in order to preserve seed upon all the earth? (#Ge 7:2). By divine ordinance he has asserted the number seven to be clean, and the number two to be unclean; since the number seven is clean by nature, inasmuch as that is a virgin number, free from all admixture, and without any parent. Nor does it generate any thing, nor is it generated, as each of those numbers which are below the number ten, on account of their similitude to the unit, because it is uncreated and unbegotten, and nothing is generated by it, although it is itself the cause of creation and generation; because it rouses the virtues of all things which are well-arranged, for the generation of created beings. But the number two is not clean. In the first place, because it is empty, not solid; and because it is not full, therefore neither is it clean; because it is likewise the beginning of infinite immensity by reason of its materiality. It also labours under inequality on account of the other long numbers; for all the other numbers after two which are increased in a twofold proportion are long numbers. But that which is unequal is not clean, as neither is that which is material; but that which proceeds from such is fallible and inelegant, being destitute of the purity of reason to conduct it to completeness and perfection; and it conducts it to such by its own intrinsic power, and by songs of harmony and equality. This is enough to say on the physical part of the subject; it remains for us to speak of its moral bearings. The irrational parts of our soul which are destitute of intellect are divided into seven; that is to say, into the five senses, and the vocal organ, and the seminal organ. Now these in a man endued with virtue are all clean, and by nature feminine, inasmuch as they belong to the irrational species; but to a man who has come into full possession of his inheritance they are masculine; for men endued with virtue are also the parents of the virtue of counsel to themselves, the best part of them not permitting them to come to the external senses in a precipitate and unbridled manner, but repressing them and leading them back to right reason. But in the wicked man there exists a twofold wickedness; since the injust man is full of doubts and perplexities, as a hesitating person, mingling things which ought not to be mixed, and connecting them with one another, confounding those things which may very easily be kept separate. Such are those passions which imbue the soul with some particular colour, like a man spotted and leprous in body, the originally sound counsel being infected and contaminated by that which is destructive and fatal. But the principle of the entrance and of the custody of animals is added in a natural manner; for he says, “for the sake of nourishing seed.” If we take the expression according to the letter, inasmuch as, although particular individuals may be destroyed, still at least a race is preserved to be the seed of future generations; forsooth that the intention of God, conceived at the formation of the world, might remain for ever and ever unextinguishable, the different races of creatures being preserved. But if we regard the inward meaning of the words, it is necessary that in the irrational parts of the soul, likewise, there should be motions which are clean, as certain seminal principles, although the animals themselves are not clean; since the nature of mankind is capable of admitting contrarieties, for instance, virtue and wickedness; each of which he delineated at the creation of the world, by the tree bearing the name of the tree of knowledge of good and evil. Forsooth our intellect, in which there is both knowledge and intelligence, comprehends both good and evil; but good is akin to the number seven, and evil is the brother of duality. Moreover, the law of wisdom, which abounds in beauty, says expressly and carefully, that seed is to be nourished, not in one place only, but in all the earth, both naturally, in the first instance, and also morally, in its peculiar sense; because it is very natural, and suitable to the character of God, to cause that which in all parts and divisions of the world is said again to be the seed of living beings, to fill places which have been evacuated a second time with similar creatures, by a repeated generation; and not altogether to desert our body, inasmuch as it is an earthly substance, as if it were a thing deserted by and void of all principle of life. Since, if we practise the drinking of wines and the eating of meats, and indulge in the ardent desire of the female, and in short practise in all things a delicate and luxurious life, we are then only the bearers of a corpse in the body; but if God, taking compassion on us, turns away the overflow of vices and renders the soul dry, he will then begin to make the body living, and to animate it with a purer soul, the governing principle of which is wisdom.