Book 1 · Section 50

(50) Why God, as he had pronounced a curse on the serpent and on the woman which bore a relation to themselves and to one another, he did not pronounce a similar one upon the man, but connected the earth with him, saying, "Cursed is the earth for thy sake; in sorrow shalt thou eat of it, thorns and thistles shall it bring forth unto thee, and thou shalt eat the grass of the field: in the sweat of thy brow shalt thou eat they bread?" (#Ge 3:17). Since all intellect is a divine inspiration, God did not judge it right to curse him in the manner deserved by his offence; but converted his curse so as to fall upon the earth and his cultivation of it. But man, as a body of co-equal nature and similar character to that of the earth and understanding, is its cultivator. When the cultivator is endowed with virtue and diligence, then the body produces its proper fruit, namely sanity, an excellent state of the outward senses, strength, and beauty. But if the cultivator be a savage, then every thing is different. For the body becomes liable to a curse, since it has for its husbandman an intellect unchastised and unsound. And its fruit is nothing useful, but only thorns and thistles, sorrow and fear, and other vices which every thought strikes down, and as it were pierces the intellect with its darts. But grass here is symbolically used for food; since man has changed himself from a rational animal into a brute beast, having neglected all divine food, which is given by philosophy, by means of distinct words and laws to regulate the will.