“Know that often a devil settles in the belly, and does not let the man be satisfied, even though he has devoured a whole Egypt and drunk a River Nile. But after one has taken food, the unclean spirit goes away and sends against us the spirit of fornication, telling him our condition and saying, ‘Catch, catch, hound him; for when the stomach is full, he will not resist much.’”

St. John Climacus