[The Rosemary Rizzo Theory discusses "developing man" a phenomenologic approach to nursing]

The Authors discuss the "Human Becoming Theory" by R.R. Parse and main philosophical principles of theory are presented: man as open system in a continuum coostrascendental relationship with the universe. Health is the model of relationship experienced by man to which he gives values for the evolution of model itself. The theory is illustrated and discussed with its structure, research methodology and application for clinical practice.