wo eswar, sollich wilden. is the opinion of Sigmund Freud, an Austrian psychoanalyst in the 2th century.

Freud has 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 gives the horse directions. 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 the ID used to be, the ego should be there." The ego, like a doormat, is caught between "three tyrants": the outside world, the superego and the ID, trying to adjust the conflicting demands among them.