Es ist mit dem Menschen wie mit dem Bauvi. Je mehr er in die Hbhe wnd Helle will, um so starker streben seine Wurzeln erdwarts, abwdrts, ins dunkle, Tiefe, - ins Bose.

[Man is like a tree; the more he strives upwards and towards the light, the stronger his roots drag him downwards, earthwards, into darkness and the abyss, - into the pit of evil.]

Nietzsche

The principle of "transposition into the opposite" is carried out in various ways in the dream. A preferable means for the substitution is the displacement from below. Anything referring to the bodily region below the umbilicus, morally abhorrent, may be transposed to the upper part. Thus, the mouth may represent the vagina. Here we encounter the first symbolic parallel (Gleichung). These symbolic parallels are a great aid to any one who knows them, at times indispensable in the interpretation of dreams. The parallelism reads: All bodily openings (in the dream) are equal to each other and may substitute one another. Thus, mouth, eyes, ears, nasal opening, anus, vagina, urethra and navel 1 may substitute each other.

An example will illustrate this principle of symbolic parallelism. A girl dreams: