The relativity theory brings space and time together as having no existence independent of each other. Mentalism explains why this is so. They are both inherent in one and the same thing--imagination; they are two ways in which the creative aspect of mind functions simultaneously.
-- Notebooks Category 19: The Reign of Relativity > Chapter 4: Time, Space, Causality > # 56
-- Perspectives > Chapter 19: The Reign of Relativity > # 3