The Fourth Dimension - Sacred Geometry, Alchemy, and Mathematics
Rudolf Steiner
Theosophy: An Introduction to the Spiritual Processes in Human ...
A Road to Self Knowledge and the Threshold of the Spiritual ...
The Science of Knowing: Outline of an Epistemology Implicit ...
The Karma of Untruthfulness: V. 1
Rudolf Steiner: Theosophie
Philosophy, Cosmology, and Religion: Ten Lectures Given at the ...
The Philosophy of Freedom
The Philosophy of Spiritual Activity
Intuitive Thinking as a Spiritual Path