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

Just as the methods of research employed by physical science trace back the organism of the physical body into the dim distance of primeval times, so it is the mode of theosophical thought to delve into the past with regard to the soul and the spirit. Now, the latter method does not lead to any conclusions antagonistic or contradictory to the facts advanced by natural science; only with the materialistic interpretations of these facts it can have nothing to do.