The pneumatics ("spiritual", from Greek πνεῦμα, "spirit") were, in gnosticism, the highest order of humans, the other two orders being psychics and hylics. The pneumatic saw himself as escaping the doom of the material world via the secret knowledge. Outsiders could only know these secrets by joining a gnostic group. To be a gnostic is to believe in three planes of existence: the pure unknown (demiurge), the material world of coitus and comfort, and the pure spiritual realm of ascension or escape.