l, whilst their mastery by the highest psychical processes are in
most persons soonest of all relinquished. Since we have learnt to
understand _infantile sexuality_, often so vague in its expression, so
invariably overlooked and misunderstood, we are justified in saying that
nearly every civilized person has retained at some point or other the
infantile type of sex life; thus we understand that repressed infantile
sex desires furnish the most frequent and most powerful impulses for the
formation of dreams.[1]

If the dream, which is the expression of some erotic desire, succeeds in
making its manifest content appear innocently asexual, it is only
possible in one way. The matter of these sexual presentations cannot be
exhibited as such, but must be replaced by allusions, suggestions, and
similar indirect means; differing from other cases of indirect
presentation, those used in dreams must be deprived of direct
understanding. The means of presentation which answer these requirements
are commonly termed "symbols." A special interest has been directed
towards these, since it has been observed that the dreamers of the same
language use the like symbols--indeed, that in certain cases community
of symbol is greater than community of speech. Since the dreamers do not
themselves know the meaning of the symbols they use, it remains a puzzle
whence arises their relationship with what they replace and denote. The
fact itself is undoubted, and becomes of importance for the technique of
the interpretation of dreams, since by the aid of a knowledge of this
symbolism it is possible to understand the meaning of the elements of a
dream, or parts of a dream, occasionally even the whole dream itself,
without having to question the dreamer as to his own ideas. We thus come
near to the popular idea of an interpretation of dreams, and, on the
other hand, possess again the technique of the ancients, among whom the
interpretation of dreams was identical with their explanation through
symbolism.

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 woman[2], 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 t