In some cases change of expression serves the purposes of dream condensation more directly, in making possible the invention of a verbal construction which is ambiguous and therefore suited to the expression of more than one dream-thought. The whole range of word-play is thus put at the service of the dream activity. The part played by words in the formation of dreams ought not to surprise us. A word being a point of junction for a number of conceptions, it possesses, so to speak, a predestined ambiguity, and neuroses (obsessions, phobias) take advantage of the conveniences which words offer for the purposes of condensation and disguise quite as readily as the dream.[DZ] That dream conception also profits by this displacement of expression is easily demonstrated. It is naturally confusing if an ambiguous word is put in the place of two ambiguous ones; and the employment of a figurative expression instead of the sober everyday one thwarts our understanding, especially since the dream never tells us whether the elements which it shows are to be interpreted literally or figuratively, or whether they refer to the dream material directly or only through the agency of interpolated forms of speech.[EA] Several examples of representations in the dream which are held together only by ambiguity have already been cited (“her mouth opens without difficulty,” in the dream of Irma’s injection; “I cannot go yet,” in the last dream reported, p. 312), &c. I shall now cite a dream in the analysis of which the figurative expression of abstract thought plays a greater part. The difference between such dream interpretation and interpretation by symbolism may again be sharply distinguished; in the symbolic interpretation of dreams the key to the symbolism is arbitrarily chosen by the interpreter, while in our own cases of verbal disguise all these keys are universally known and are taken from established customs of speech. If the correct notion occurs at the right opportunity, it is possible to solve dreams of this sort completely or in part, independently of any statements made by the dreamer.