This chapter traces the path Sigmund Freud forged over many decades, the focus being his effort to conceptualize the split psyche, his fundamental axiom. Analysts have seen Freud’s unrelenting drive at work as he endeavoured to come to terms with his fundamental working hypothesis. Analysts find the first schema of the psyche, conceptualized in neurological terms. At this time Freud depicted the psyche in terms of a neurological system that is a continuous chain through which energy is conducted. The schema is really no more than in sketch form but it shows Freud’s ideas quite clearly. There are three different types of registration, each separated according to different neurones which are their vehicles. Although he does draw on the neurological ideas and terminology of the earlier schemata and incorporates the key concept of memory, same time analysts find a growing clarity in conceptualization.