Sigmund Freud book The Interpretation of Dreams
The Interpretation of Dreams (1900), from The Standard Edition of the Complete Psychological Works of Sigmund Freud, translated by James Strachey. <br class="br">At any rate the interpretation of dreams is the via regia to a knowledge of the unconscious in the psychic life. <br class="br">Alternate translation by Abraham Arden Brill, p. 483 http://books.google.com/books?id=OSYJAAAAIAAJ&pg=PA483#v=onepage&q&f=false. Freud did use the Latin phrase via regia in the original as opposed to translating it into the German of the surrounding text. <br class="br">"Royal road" or via regia is an allusion to a statement attributed to Euclid. <br class="br">1900s