Quod Deterius Potiori Insidiari Soleat

Therefore, the faculty which is common to us with the irrational animals, has blood for its essence. And it, having flowed from the rational fountain, is spirit, not air in motion, but rather a certain representation and character of the divine faculty which Moses calls by its proper name an image, showing by his language that God is the archetypal pattern of rational nature, and that man is the imitation of him, and the image formed after his model; not meaning by man that animal of a double nature, but the most excellent species of the soul which is called mind and reason.

On this account, Moses represents God as calling the blood the life of the flesh, though he is aware that the nature of the flesh has no participation in intellect, but that it does partake of life, as also does our whole body. And the soul of man he names the spirit, meaning by the term man, not the compound being, as I said before, but that Godlike creation by which we reason, the roots of which he stretched to heaven, and fastened it to the outermost rim of the circle of those bodies which we call the fixed stars.