You often say, 'I have had a strange dream, a frightful dream, without any likeness to reality' You are mistaken in thinking it to be so; for it is often a reminiscence of places and things which you have seen in the past, or a foresight of those which you will see in another existence, or in this one at some future time. The body being torpid, the spirit tries to break his chain, and seeks, in the past or in the future, for the means of doing so.

p. 204. - The Spirits' Book