For most people, the term boundary brings to mind an image of some physical barrier that keeps something in or out, such as a fence or a wall. These examples are physical, but boundaries also can be emotional or interpersonal. Just as physical boundaries keep some things in and others out, so do emotional ones. Emotional or interpersonal boundaries are the necessary space between people that allows a sense of individuality and separateness. This sense of uniqueness is essential for the development of a healthy person and ultimately the development of a professional identity.