This easy and regularly occurring deviation of the psychic process from the former painful memory presents to us the model and the first example of psychic repression. As is generally known, much of this deviation from the painful, much of the behavior of the ostrich, can be readily demonstrated even in the normal psychic life of adults.

By virtue of the principle of pain the first system is therefore altogether incapable of introducing anything unpleasant into the mental associations. The system cannot do anything but wish. If this remained so the mental activity of the second system, which should have at its disposal all the memories stored up by experiences, would be hindered.

But two ways are now opened: the work of the second system either frees itself completely from the principle