The Spirits' Book
Book Two - The Spirit World
Chapter VIII - Emancipation of the Soul
Sleep and Dreams
405. We often see things in dreams that appear to be premonitions, but they do not come to fruition. What is the reason for this?
“The spirit may experience these things, while the body does not. The spirit sees what it wishes to see because it goes out looking for it. During sleep, the spirit is always more or less under the influence of matter. Consequently, it is never completely free from human ideas, and the objects of its waking thoughts may conjure up what it desires or fears, producing an effect of the imagination. When the mind is preoccupied with an idea, it is very quick to connect everything it sees to that idea.”