De Opificio Mundi

And since all the things on the earth depend upon the heavenly bodies according to a certain natural sympathy, it is in heaven too that the ratio of the number seven began, and from thence it descended to us also, coming down to visit the race of mortal men. And so again, besides the dominant part of our mind, our soul is divided into seven divisions; there being five senses, and besides them the vocal organ, and after that the generative power. All which things, like the puppets in a raree show, which are moved by strings by the manager, are at one time quiet, and at another time in motion, each according to its suitable habits and capacities of motion.

And in the same way, if any one were to set about investigating the different parts of the body, in both their interior and the exterior arrangement, he will in each case find seven divisions. Those which are visible are as follow; —the head, the chest, the belly, two arms, and two legs; the internal parts, or the entrails, as they are called, are the stomach, the heart, the lungs, the spleen, the liver, and the two kidneys.

Again, the principal and dominant part in an animal is the head, and that has seven most necessary divisions: two eyes, an equal number of ears, two channels for the nostrils, and the mouth to make up seven, through which as Plato says, mortal things find their entrance, and immortal things their exit. For into the mouth do enter meat and drink, perishable food of a perishable body; but from out of it proceed words—the immortal laws of an immortal soul, by means of which rational life is regulated.

Again, the things which are judged of by the best of