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).
It is easy to see that the ego is that part of the id which has been modified by the direct influence of the external world. (Sigmund Freud, 1923, The Ego and the Id) The ego represents what we call reason and sanity, in contrast to the id which contains the passions. (Sigmund Freud, 1923, The Ego and the Id)