"Neurosis behaves in the same fashion. I know a patient who- involuntarily and unwillingly- hears (hallucinates) songs or fragments of songs without being able to understand their significance for her psychic life. She is certainly not a paranoiac. Analysis shows that by exercising a certain license she gave the text of these songs a false application. "Oh, thou blissful one! Oh, thou happy one!" This is the first line of Christmas carol, but by not continuing it to the word, Christmastide, she turns it into a bridal song, etc. The same mechanism of distortion may operate, without hallucination, merely in association."
Sigmund Freud, The Interpretation of Dreams (3rd edition). Translated by A. A. Brill (1911)
