Greed, anger, and ignorance, understood in modern terms, refer to the three most basic negative emotions in the human heart, also known as the "three poisons." Greed is greed, asking for everything endlessly. Buddhism usually uses pigeons to symbolize it. Because pigeons are greedy, as long as you feed them, they will eat until they die. Anger is anger, getting angry at every turn, and being in emotional troubles. Buddhism usually Use a snake to symbolize it, because snakes are angry and always think you are provoking it. It will always straighten its neck and "hiss" in anger, trying to attack; ignorance is ignorance, unable to distinguish between black and white, right from wrong, and full of "no". The stubbornness and ignorance of "hitting the wall and not looking back" are usually symbolized by pigs in Buddhism. Because pigs are stupid by nature, we often say that "tiger poison cannot eat its seeds". When pigs are hungry, they will even eat their own piglets. These three emotions exist in our hearts and lead people to perform various unwholesome behaviors. Therefore, Buddhist practice can basically be summarized in one sentence: "Practice precepts diligently, calm down, and wisdom, and extinguish greed, anger, and ignorance."