II. Haeckel's “Riddle of the Universe” and Theosophy

All attempts made by men in the present day towards the fundamentalising of world-theories are to be found in still bolder outline among the works of Oken. And yet all this was animated by a certain subtleness—a breath, as it were, of that old spiritualism which is clearly conscious that, behind and beyond all that our senses can perceive, all that can be investigated by means of instruments, there still lurks something spiritual to be sought for. Haeckel has again and again told us how distinctly the mind of his great teacher—that deep student of natural science, Johannes Müller, of imperishable memory—was tinged with this subtle breath. You can read in Haeckel's own writings how he had been struck (it was at the time when he was busy at the Berlin University and studying the anatomy of men and animals under Johannes Müller) by the great resemblance apparent not alone in outward form, but also by that similarity which compels attention in the evolution of form. He tells us how he had remarked to his master that such resemblance as this must hint at some mysterious kinship between man and beast, and that the answer made by Johannes Müller, who had searched so deeply into Nature, had been: “Ah! he who lays bare the secret of species will indeed have reached the highest summit.”