In the Buddhist Wheel of Life, the center has a circle in which there are three animals, a pig, a rooster and a snake holding each other by the tail. The pig stands for the delusion or ignorance that says, “I am the real thing”, the center of the universe and the most important being in it and everyone else is separate from me!” This deep conviction of the egoistic self places that person in the unwinnable situation of confrontation with the universe, which everyone has to lose sooner or later. Based on this perspective, the person wants to consume lots of the universe to turn it into him or herself; this is called greed represented by the rooster. If possible the person would devour the whole thing and then would no longer need to fear it. But the universe is infinite so they never succeed. Also based on the same perspective, the person, fears others want to devour him or her and so becomes paranoid and seeks to repel them, this is anger and hatred, symbolized by the snake.
These are the three toxins (trivisha) that make the unenlightened world go around, the samsara of endless suffering. In Indo Tibetan medicine they correspond to phlegm, wind and bile. Health for an unenlightened person is the balance of these toxins and energies. But real health comes from the detoxification, removal of the toxins by wisdom, insight into the true nature of reality, the experience of the self-being one with the universe, filled with energy and bliss, not needing to be greedy, not fearing or hating anyone, but being compassionate to all living things.