The Spirits' Book
Book Two - The Spirit World
Chapter VI - Spirit Life
223. Does the soul reincarnate immediately after being separated from the body?
“Sometimes the separation happens immediately, but more often it occurs after longer or shorter intervals of time. Reincarnation is almost always immediate in higher worlds. Corporeal matter is less coarse in those worlds and a spirit retains nearly full use of its spiritual faculties while incarnated. Its normal state is that of a lucid somnambulist.”