When the depressive psychosis has become manifest, its cardinal feature seems to be a mental inhibition which renders a rapport between the patient and the external world more difficult.
Other quotes by Karl Abraham
A person who suffers from severe locomotor anxiety finds himself in an almost permanent state of mental tension. He wakes in the morning with the anxious expectation of having to go out somewhere in the course of the day.
Anyone who is interested in the psychology of children will have observed that whereas one child will resist temptation or seduction, another will easily yield to it. There are children who will hardly oppose any resistance to the invitation of an unknown person to follow him; others who react in an opposite way in the same circumstances.