2013 Reprint of 1933 Edition. Full facsimile of the original edition, not reproduced with Optical Recognition Software. Georg Groddeck (1866-1934) was a physician and writer regarded as a pioneer of psychosomatic medicine. Of his method Groddeck wrote: He who draws the conclusion that I mentally medicate a human who has broken his leg is very true - but I adjust the fracture and dress the wound. And then - I give him a massage, make exercises with him, give a daily bath to the leg with water at 45 C for half an hour and I take care that he does neither gorge nor booze, and every now and then I ask him: Why did you break your leg…? The present volume is a compilation of addresses and articles taken, for the most part, from journal articles. Chapters include: Shadows of the Past Unconscious Purpose in Animal Behavior Unconscious Factors in Organic Processess Unconscious Symbolism in Language and Art Theoretical Bases