The desires only supply the impulse

The desires only supply the impulse. The mind creates the dream out of the materials supplied by the experiences of the waking state. The dream creatures spring up from the bed of Samskaras or impressions in the subconscious mind. Indigestion also causes dream. The Taijasa is the dreamer. It is the waking personality that creates the dream personality. The dream personality exists as the object of the waking personality and is real only as such.Swami Sivananda