Clement of Alexandria

And perhaps the two tables themselves may be the prophecy of the two covenants. They were accordingly mystically renewed, as ignorance along with sin abounded. The commandments are written, then, doubly, as appears, for twofold spirits, the ruling and the subject. "For the flesh lusteth against the Spirit, and the Spirit against the flesh."

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, thou shalt not serve the carnal spirit, but shall rule over it; "For the flesh lusteth against the Spirit," and excites to disorderly conduct against nature; "and the Spirit against the flesh" exercises sway, in order that the conduct of the man may be according to nature.