The slow process of body and ego maturation in the human is seen as the outcome of both retardation and acceleration processes. Weyl divides the qualities of the mental apparatus into two groups paralleling Bolk's division: 1, primary functions of retardation: ego and consciousness; and 2, consecutive functions of acceleration: inherent and acquired automatisms utilizing the speed of unconscious processes. The latter retain the original speed of the reflex mechanism (primary process) and can be used to counteract the retarding processes of the ego and consciousness (secondary process). Weyl demonstrates that all mental functioning can be aligned oppositely: thinking, speech, the symbolic function, and the use of unconscious processes are seen as consecutive procedures corrective of and contributing to the retardation functions of the ego, superego, and conscious processes. Sublimation, love, social interaction, culture, and religion are seen as primarily reflecting retardation processes affecting the handling of aggressive and sexual instinctual strivings.