A peak experience is an altered state of consciousness characterized by euphoria, often achieved by self-actualizing individuals. The concept was originally developed by psychologist Abraham Maslow in mid-1940s and term was coined by him in 1956. According to T. Landsman, "Maslow described them [peak experiences] as rare, exciting, oceanic, deeply moving, exhilarating, elevating experiences that generate an advanced form of perceiving reality, and are even mystic and magical in their effect upon the experimenter." There are several unique characteristics of a peak experience, but each element is perceived together in a holistic manner that creates the moment of reaching one's full potential. Peak experiences can range from simple activities to intense events; however, it is not necessarily about what the activity is, but the ecstatic, blissful feeling that is being experienced during it.