LIV. (160) Moses therefore does well when he adds, “Thou shalt go upon thy breast and upon thy Belly.”{72}{#ge 3:14.} For pleasure is not one of the things which is tranquil and steady, but is rather a thing which is in constant motion and full of confusion, for as flame is excited by being moved, so passion when it is put in motion in the soul, being in some respects like a flame, does not suffer it to rest. On which account he does not agree with those who pronounce pleasure a stable feeling, for tranquillity is connected with stones and trees, and all kinds of inanimate things, but is quite inconsistent with pleasure; for it is fond of tickling and convulsive agitation, and with regard to some of its indulgences it has not need of tranquillity but of an intense and violent unseemliness of commotion.

LV. (161) But the expression, “And dust shalt thou eat all the days of thy life,” is also used with great propriety. For the pleasures which are derived from the food of the body are all earthly. And may we not reasonably speak thus? There are two several parts of which we consist, the soul and the body; now the body is made of earth, but the soul consists of air, being a fragment of the Divinity, for “God breathed into man’s face the breath of life, and man became a living Soul.”{73}{#ge 2:7.} It is therefore quite consistent with reason to say that the body which was fashioned out of the earth has nourishment which the earth gives forth akin to the matter of which it is composed; but the soul, inasmuch as it is a portion of the ethereal nature, is supported by nourishment which is ethereal and divine, for it is nourished on knowledge, and not on meat or drink, which the body requires.