Were I now to assert that a sign had been given to ME--to me, as one out of the thousands who demand it--such daring assurance on my part would meet with the most strenuous opposition from all who peruse the following pages; each person who reads having his own ideas on all subjects, and naturally considering them to be the best if not the only ideas worth anything. Therefore I wish it to be plainly understood that in this book I personally advocate no new theory of either religion or philosophy; nor do I hold myself answerable for the opinions expressed by any of my characters. My aim throughout is to let facts speak for themselves. If they seem strange, unreal, even impossible, I can only say that the things of the invisible world must always appear so to those whose thoughts and desires are centred on this life only.