LIV. (160) Moses therefore does well when he adds, "Thou shalt go upon thy breast and upon thy Belly."[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.