Any one who does not approach my world of ideas without preconceptions is sure to discover therein contradiction after contradiction. I have quite recently (Berlin, 1900. S. Cronbach) dedicated a book upon the world conceptions of the nineteenth century to that great naturalist, Ernst Haeckel, and closed it with a defence of his thought-world. In the following expositions, I speak about the Mystics, from Master Eckhart to Angelus Silesius, with a full measure of devotion and acquiescence. Other “contradictions,” which one critic or another may further count up against me, I shall not mention at all. It does not surprise me to be condemned from one side as a “Mystic” and from the other as a “Materialist.” When I find that the Jesuit Father Müller has solved a difficult chemical problem, and I therefore in this particular matter agree with him unreservedly, one can hardly condemn me as an adherent of Jesuitism without being reckoned a fool by those who have insight. Whoever goes his own road, as I do, must needs allow many a misunderstanding about himself to pass. That, however, he can put up with easily enough. For such misunderstandings are, in the main, inevitable in his eyes, when he recalls the mental type of those who misjudge him. I look back, not without humorous feelings, upon many a “critical” judgment that I have suffered in the course of my literary career. At the outset, matters went fairly well. I wrote about Goethe and his philosophy. What I said there appeared to many to be of such a nature that they could file it in their mental pigeon-holes. This they did by saying: “A work such as Rudolf Steiner’s _Introduction to Goethe’s Writings upon Natural Science_ may, without hesitation, be described as the best that has been written upon this question.”