Freud has such a metaphor for the relationship between id and ego: id is a horse and ego is a coachman. The horse is the driving force, and the coachman guides the horse. The ego wants to control the ego, but the horse may not obey, and the two will be deadlocked until one side gives in. Freud famously said, "Where I am, I should be there." The ego is like a doormat, sandwiched between "three tyrants": the outside world, the superego and the ID, trying to adjust their conflicting needs. Superego represents conscience, social norms and self-ideal, and is a senior leader of personality. It acts according to the principle of perfection, guides itself and constrains the ego, just like a strict and serious parent. Freud believed that only when the three "I" live in harmony and maintain balance can people develop healthily; When three people quarrel, people sometimes think, "Is this me?" ? Or have a different voice in your heart: "Well done? Can't you? " Or is it because of the conflict between desire and morality? Or are you afraid of some ugly ideas that stand out from the crowd?