This work, essentially Rudolf Steiner’s doctoral dissertation, subtitled “Introduction to the Philosophy of Freedom,” is just that an essential work in the foundations of spiritual science. In it, the epistemological foundations of spiritual knowledge are clearly and logically presented. This work, essentially Rudolf Steiner’s doctoral dissertation, subtitled “Introduction to the Philosophy of Freedom,” is just that an essential work in the foundations of spiritual science. In it, the epistemological foundations of spiritual knowledge are clearly and logically presented.