is rendered less excitable by sleep than that directed to the P-systems. The giving up of interest for the nocturnal mental processes is indeed purposeful. Nothing is to disturb the mind; the Forec. wants to sleep. But once the dream becomes a perception, it is then capable of exciting consciousness through the qualities thus gained. The sensory stimulus accomplishes what it was really destined for, namely, it directs a part of the energy at the disposal of the Forec.

in the form of attention upon the stimulant. We must, therefore, admit that the dream invariably awakens us, that is, it puts into activity a part of the dormant force of the Forec. This force imparts to the dream that influence which we have designated as secondary elaboration for the sake of connection and comprehensibility. This means that the dream is