He confessed that his passion for collecting was second in intensity only to his addiction to cigars. The importance of the collection cab be seen in Freud's use of archaeology as a metaphor for psychoanalysis. One example of this is Freud's explanation to a patient that conscious material 'wears away' while what is unconscious is relatively unchanging: "I illustrated my remarks by pointing to the antique objects about my room. They were, in fact, I said, only objects found in a tomb, and their burial had been their preservation".