(1) ingestion of food;
(2) contact with enjoyable sense objects, such as sights, sounds, scents, flavors, and tactile sensations;
(3) formation of mental food, such as ideas, expectations, and recollections; and
(4) ālaya consciousness that maintains one’s physiological and mental processes as well as carries karmic seeds, which will lead to future rebirths. An ordinary being in the desire realm requires these four kinds of nourishment to survive.