Der sichtbare und der unsichtbare Mensch. Darstellung verschiedener Menschentypen, wie der geschulte Hellseher sie wahrnimmt

we would hardly waste many words to defend our so-called delusion before him. We would simply say: I know that I see, and it is useless to try to convince me of the opposite; all daily experiences of my life confirm to me that I see, and I refuse to let the certain knowledge of positive facts be denied to me. This is exactly how the trained clairvoyant feels when ignorant people claim that he cannot possibly possess a power that he is exercising at that very moment to investigate the thoughts of these very clever people.

I therefore do not intend to prove the existence of clairvoyance in this book; I take it as proven and describe what can be seen by means of this faculty. Nor do I want to repeat the details here that I gave in the already mentioned booklet about the methods of clairvoyance, but limit myself simply to a short presentation of the general principles on this subject. These are absolutely necessary so that beginners, who have not yet read any other theosophical books, can understand this book.

The Planes of Existence in Nature.

In order to state these general principles, however, I must begin by explaining some of those facts that were discovered through the use of this very faculty. Above all, we must become clear about the wonderful composition of the world surrounding us, which contains much more than we can see with the physical eye.

We all know that matter has different states of aggregation, and that it can be changed by pressure and changes in temperature. We have the three well-known states of matter: the solid, liquid, and gaseous. Science teaches that all substances can occur in these states through changes in temperature and pressure. I believe there are still a few substances that the chemist has not yet been able to transfer from one state to another; but it is generally believed that just as water at a low temperature...