De Agricultura

For when the wave rises high and dashes over each side of the soul (looking upon it as a ship), that is to say, over the mind and the outward sense, being lifted up by evident passions and iniquities which blow fiercely upon it, so that the soul leans on one side and is nearly over-balanced; then, as is natural, the mind becoming water-logged, goes down, and the deep in which it is sunk and overwhelmed is the body, which is compared to Egypt.