The Interpretation of Dreams by Sigmund Freud Chapter 3 Page 30

Though the study of dream symbolism is far removed from finality, we now possess a series of general statements and of particular observations which are quite certain. There are symbols which practically always have the same meaning: Emperor and Empress (King and Queen) always mean the parents; room, a woman2, and so on.

The sexes are represented by a great variety of symbols, many of which would be at first quite incomprehensible had not the clews to the meaning been often obtained through other channels.

There are symbols of universal circulation, found in all dreamers, of one range of speech and culture; there are others of the narrowest individual significance which an individual has built up out of his own material. In the first class those can be differentiated whose claim