The Interpretation of Dreams by Sigmund Freud Chapter 4 Page 10

ambiguity of dreams as well as of all other psychopathological formations. We have seen that at the same time that she dreams of the denial of the wish, the patient is in reality occupied in securing an unfulfilled wish (the caviare sandwiches). Her friend, too, had expressed a wish, namely, to get fatter, and it would not surprise us if our lady had dreamt that the wish of the friend was not being fulfilled.

For it is her own wish that a wish of her friend's — for increase in weight — should not be fulfilled. Instead of this, however, she dreams that one of her own wishes is not fulfilled. The dream becomes capable of a new interpretation, if in the dream she does not intend herself, but her friend, if she has put herself in the place of her friend, or, as we may say, has identified herself with her friend.