A psychedelic experience is characterized by the perception of aspects of one's mind previously unknown, or by the creative exuberance of the mind liberated from its ordinary restraints. Psychedelic states are one of the stations on the spectrum of experiences elicited by sensory deprivation as well as by psychedelic substances. On that same spectrum will be found illusions, changes of perception, altered states of awareness, mystical states, and occasionally states resembling schizophrenia. The word psychedelic comes from a combination of two Greek words: psyche (ψυχή) and delos (δήλος). Literally, it means "soul manifestation".