Some people are so greatly influenced by theories built up on the basis of exact scientific experience that they cannot do otherwise than regard the contents of a book like this as a boundless absurdity. The exponent of supersensible truths is able to view such a fact entirely free from any illusions. People will certainly be prone to demand that he give irrefutable proofs for what he states, but they do not realize that in so doing they are the victims of a misconception. They demand, although unconsciously, not the proofs lying within the things themselves, but those that they personally are willing to recognize or are in a condition to recognize.
The author of this book is sure that any person, taking his stand on the basis of the science of the present day, will find that it contains nothing that he will be unable to accept. He knows that all the requirements of modern science can be complied with, and for this very reason the method adopted here of presenting the facts of the supersensible world supplies its own justification. In fact, the way in which true modern science approaches and deals with a subject is precisely the one that is in full harmony with this presentation.
Anyone who thinks thus will feel moved by many a discussion in a way described by Goethe’s deeply true saying, “A false teaching does not offer any opening to refutation because it rests upon the conviction that the false is true.” Argument is fruitless with those who allow only such proofs to weigh with them as fit in with their own way of thinking. Those who know the true nature of what is called “proving” a matter see clearly that the human soul finds truth through other means than by argument. It is with these thoughts in mind that the author offers this book for publication.
Source: Rudolf Steiner – GA 9 – Theosophy – From the Prefaces to the First, Second, and Third Editions
Translated by Henry B. Monges and revised for this edition by Gilbert Church, Ph.D.