Psychical processes may often, by the use of certain points of view, be deduced from the tendency to equilibrium (as may biological processes in general, as well as physical, economic, or other processes). The transition from a state of rest to a process, as well as change in a stationary process, may be derived from the fact that the equilibrium at certain points has been disturbed and that then a process in the direction of a new state of equilibrium sets in. In carrying through this line of thought, however, one must pay special attention to certain points. The process moves in the direction of a state of equilibrium only for the system as a whole. Part processes may at the same time go on in opposed directions. It is hence important to take the system whole which is dominant at the moment as basis.