Theoretical Components Nursing is a multidimensional field. The role of the nurse has changed over many years and the role of nurses has evolved enormously. The twentieth century brought us Virginia Henderson (first lady of nursing) who defined nursing as “the unique function of the nurse is to assist the individual, sick or well, in carrying out those activities which contribute to health or to his recovery (or peaceful death”). ) which he would perform unaided if he had the necessary strength, will or knowledge. And do it in a way that helps it gain independence as quickly as possible” (Burggraf, 2012). Today we view the nursing role very differently, largely due to nursing theory. Hildegard Peplau believed that nurses should be more cognitive of the patient's needs rather than simply performing the necessary tasks. Hildegard Peplau was a theorist born in Reading, Pennsylvania in 1909. She had an extensive educational background including completing her nursing diploma program, obtaining a bachelor's degree in interpersonal psychology, earning a master's degree in psychiatric nursing, and finally the doctorate in curriculum development. With this extensive training in psychology and psychiatry, it is no wonder that she developed the theory of interpersonal relationships and was given the name “mother of psychiatric nursing” (Toomey & Algood, 2006). His theory is said to have been influenced by Harry Stack Sullivan who developed the interpersonal theory. Peplau created the midlevel nursing theory of interpersonal relationships. His theory can be related to psychodynamic nursing (understanding one's own behavior) and "paved the way towards the humane treatment of patients with behavioral and personality disorders" (O'Toole &...... half of document ..... .5.Gastmans, C. (1998). Interpersonal relationships in nursing: an ethical-philosophical analysis of the work ofHildegard E. Peplau Journal Of Advanced Nursing, 25(6), 1312-1319. Gonzalo, A. (2011 Theoretical Foundations of Nursing. Hildegard E. Peplau. Retrieved from http://nursingtheories.weebly.com/hildegard-e-peplau.html O'Toole, A.W., & Welt, S.R. (Ed. ). Interpersonal Theory in Nursing Practice: Selected Work by Hildegard E. Peplau New York: Springer Publishing Company. Middleton J. (2010) Hildegard Peplau- developed the concept of psychodynamic nursing NursingTimes.net Retrieved from http:/ /www.nursingtimes.net/whats-new-in-nursing/hall-of-fame/hildegard-peplau-developed. -the-concept-of-psychodynamic-nursing/5012105.articleToomey, AM, & Allgood, MR (2006) Nursing theorists and their work (6th ed.). St. Louis, MO: Mosby.