My own ego lies concealed

It is my experience, and one to which I have found no exception, that every dream deals with the dreamer himself. Dreams are completely egoistical. Whenever my own ego does not appear in the content of the dream, but only some extraneous person, I may safely assume that my own ego lies concealed, by identification, behind this other person; I can insert my ego into the content. On other occasions, when my own ego does appear in the dream, the situation in which it occurs may teach me that some other person lies concealed, by identification, behind my ego. In that case the dream should warn me to transfer on to myself, when I am interpreting the dream, the concealed common element attached to this other person.

Chapter VI: The Dream-Work, C. The Means of Representation in The Interpretation of Dreams, 1900, Sigmund Freud, James Strachey translation