CW 324a The Fourth Dimension Lecture 3: Studying four dimensional space to understand the Astral World and higher existence (Berlin, May 17, 1905) by Rudolf Steiner

Exploring the complexities of four-dimensional space, understanding the astral world and radiating from within, exploring the astral world and future experiences, constructing a mental image of a cube and understanding opposites, and delving into the mysteries of nature through inversion and interface.