: Inspired by Alfred Witte, Ebertin refined the use of midpoints—the mathematical halfway point between two planets—to uncover hidden psychological and biological layers in a natal chart. Multifaceted Correspondences
The Combination of Stellar Influences (COSI), written by Reinhold Ebertin in 1940, is the foundational text of Cosmobiology : Inspired by Alfred Witte, Ebertin refined the