The Interpretation of Dreams by Sigmund Freud Chapter 4 Page 41

superficially attached to the idea which accompanies it and comes from another source.

On account of the intimate relation of dream fear to neurotic fear, discussion of the former obliges me to refer to the latter. In a little essay on “The Anxiety Neurosis,”6 I maintained that neurotic fear has its origin in the sexual life, and corresponds to a libido which has been turned away from its object and has not succeeded in being applied. From this formula, which has since proved its validity more and more clearly, we may deduce the conclusion that the content of anxiety dreams is of a sexual nature, the libido belonging to which content has been transformed into fear.

Footnote 1: To sit for the painter. Goethe: “And if he has no backside, how can the nobleman sit?”