Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The term Healthy narcissism represents, in accordance with Ronnie Solan''s assumption, a new understanding of the functioning of narcissism as an emotional-immune system for safeguarding the familiarity and the well-being of the individual against invasion by foreign sensations (1998) and small differences (Freud 1929-1930). The innate immunization vacillates between well-being, in the presence of the familiar, and alertness as well as vulnerability, facing the stranger. From childhood, the familiar is tempting and the strangeness is intolerable from within (illness) or from outside (otherness). Hence, narcissistic immunization might be compared to the activity of the biological immunological system that identifies the familiar protein of the cell and rejects the foreign protein (bacteria, virus).