twofold spirits, the ruling and the subject. "For the flesh lusteth against the Spirit, and the Spirit against the flesh."[1]
And there is a ten in man himself: the five senses, and the power of speech, and that of reproduction; and the eighth is the spiritual principle communicated at his creation; and the ninth the ruling faculty of the soul; and tenth, there is the distinctive characteristic of the Holy Spirit, which comes to him through faith.
Besides, in addition to these ten human parts, the law appears to give its injunctions[2] to sight, and hearing, and smell, and touch, and taste, and to the organs subservient to these, which are double—the hands and the feet. For such is the formation of man. And the soul is introduced, and previous to it the ruling faculty, by which we reason, not produced in procreation; so that without it there is made up the number ten, of the faculties by which all the activity of man is carried out. For in order, straightway on man's entering existence, his life begins with sensations. We accordingly assert that rational and ruling power is the cause of the constitution of the living creature; also that this, the irrational part, is animated, and is a part of it. Now the vital force, in which is comprehended the power of nutrition and growth, and generally of motion, is assigned to the carnal spirit, which has great susceptibility of motion, and passes in all directions through the senses and the rest of the body, and through the body is the primary subject of sensations. But the power of choice, in which investigation, and study, and knowledge, reside, belongs to the ruling faculty. But all the faculties are placed in relation to one—the ruling faculty: it is through that man lives, and lives in a certain way.
Through the corporeal spirit, then, man perceives, desires, rejoices, is angry, is nourished, grows. It is by it, too, that thoughts and conceptions advance to actions. And when it masters the desires, the ruling faculty reigns.
The commandment, then, "Thou shalt not lust," says,
