""Letters on the Logos"" is a book written by Charles W. Upham. The book is a collection of letters written by the author to his friend, discussing the concept of Logos, which is a Greek term that refers to the divine reason or wisdom that governs the universe. Upham explores the significance of Logos in various aspects of life, including religion, philosophy, and science. He also delves into the history of the concept, tracing its origins in ancient...