What does the term river stage mean? Water science questions and answers, from the USGS Water Science School
According to Sigmund Freud, the ego is part of personality that mediates the demands of the id, the superego and reality. The ego prevents us from acting on our basic urges (created by the id), but also works to achieve a balance with our moral and idealistic standards (created by the superego).
In contrast to the instinctual id and the moral superego, the ego is the rational, pragmatic part of our personality. It is less primitive than the id and is partly conscious and partly unconscious.