Abd-ru-shin (1875–1941) was born Oskar Ernst Bernhardt in Germany. From 1923, he began writing the lectures of the Grail Message, "In the Light of Truth." His work serves as a guide for those seeking spiritual clarity, explaining the Laws of Creation—such as Sowing and Reaping—with unwavering logic. He did not seek to form a new religion, but to lead the individual back to a conscious, responsible existence before the Creator.