Rest has been examined only sporadically in the nursing literature, primarily as a physiologic need closely related to sleep. The article describes the concept of rest from a variety of perspectives and lays the foundation for further analysis. Themes of physical, mental, and spiritual components of rest emerge as the concept is explored. Further analysis of the concept of rest in both health and illness is recommended. Exploration of the individual patient's perception of rest and restful activities seems to be a key to promoting and prescribing rest as a nursing intervention.